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  • need expert help

    hey all, in need of some help. im trying to polish the aluminum lips on my rims and i've read around the forums to find the best way to do this and came across a few post where baz mentioned sanding up to 600 grit and using green SS compound with tight sewn wheel and white rouge with loose wheel. this seems like the easiest and fastest method instead of sanding up to 2000 grit like what others have recommended.

    i've sanded the rims with 240 grit to get most of the curb rash off and im planning to hit it with 400 and then 600. is 600 necessary? or would i be able to remove 400 grit with a certain compound?

    the issue im having right now is with my polisher. i have a 3" pneumatic polisher from harbor freight i believe max rpm is 2000. would this be adequate to remove 400-600 grit? also, im having trouble finding the right attachment for this type of polisher. the thread size is 5/16"x24. what would you recommend?

  • #2
    Re: need expert help

    when i read things like (i've sanded the rims with 240 grit to get most of the curb rash off )that tells me a lot about what the final product will look like.
    not trying to discourage you but polishing is not that easy , you should get ALL curb rash off then go to next grit and sand until you have removed ALL sanding marks left by previous grit and then repeat with next grit and so on .
    if you try to cut corners to save time you will have the results that go with it .

    your next question ! i am not even sure you will be able to remove 600 grit marks with that 3 inch polisher .
    when i do lips i either use a 3 hp fixed buffer or a handheld dewalt angle sander polisher that has enough power to spin a 8 inch buffing wheel . not saying that your buffer won t do the job , it might work but it will take you much more work to get it done and yes you could find a more aressive compound that will cut faster .
    http://www.peintureenpoudrepb.com
    http://www.polissagepb.com
    http://www.powdercoatpb.com
    baz

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    • #3
      Re: need expert help

      Baz is right on. Air tools have very little torque. To polish metal with buffing compound you need to be able to bear down on the piece with a good bit of pressure. Most air tools will just stop in such usage.

      Also, 2000 RPM would be okay with a 6 or 8 inch wheel, but with a 3 inch wheel you would want a lot more RPM's to obtain the same surface speed on the edge of your wheel. I sometimes use an air die grinder with a two inch wheel for hard to get at places. I run that at maybe 8000 to 10000 RPM.

      Richard
      Last edited by Rasper; 10-22-2013, 07:22 PM.

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      • #4
        Re: need expert help

        Thx guys for the help. I have removed all the curb rash but there are some nicks that are just too deep. Might have to go coarser than 240. I don't intend to skip steps or cut corners I just don't want to do unnecessary work. If I can sand up to 400 or 600 then move on to a compound to remove those scratches would be better than sanding up to 2000. I'll be ditching the polisher and getting something like a Makita 9227c. What compounds do u guys recommend?

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        • #5
          Re: need expert help

          Originally posted by exstaZ View Post
          Thx guys for the help. I have removed all the curb rash but there are some nicks that are just too deep. Might have to go coarser than 240. I don't intend to skip steps or cut corners I just don't want to do unnecessary work. If I can sand up to 400 or 600 then move on to a compound to remove those scratches would be better than sanding up to 2000. I'll be ditching the polisher and getting something like a Makita 9227c. What compounds do u guys recommend?
          you can keep the 3 inch polisher for other polishing jobs where you need a smaller tool for hard to reach areas,

          makita 9227c would be a good move and if you look on caswell s site they have the adapter that lets you use polishing wheels with it.
          http://www.peintureenpoudrepb.com
          http://www.polissagepb.com
          http://www.powdercoatpb.com
          baz

          Comment


          • #6
            Re: need expert help

            Originally posted by baz View Post
            you can keep the 3 inch polisher for other polishing jobs where you need a smaller tool for hard to reach areas,

            makita 9227c would be a good move and if you look on caswell s site they have the adapter that lets you use polishing wheels with it.
            thanks baz, i found that it was easier to sand the tight spots by hand. i've sanded the rims down to 400 but im still a little confused on what compounds to use. black emery seems to be the best bet followed by green and then white. I watched a few videos on youtube and some were using brown tripoli after sanding with 800

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            • #7
              Re: need expert help

              Originally posted by exstaZ View Post
              thanks baz, i found that it was easier to sand the tight spots by hand. i've sanded the rims down to 400 but im still a little confused on what compounds to use. black emery seems to be the best bet followed by green and then white. I watched a few videos on youtube and some were using brown tripoli after sanding with 800
              the more you look the more you will see or read about different ways of doing.
              i think every experienced polisher has his own tecnique that works for him .
              i think from there you will have to do some experimenting to see what works best for you.

              my suggestion was to sand to 600 grit but if you can get the 400 grit marks off with compound then it s good.
              one last thing ,if your going to be doing any serious polishing then forget about hand sanding anything . .
              http://www.peintureenpoudrepb.com
              http://www.polissagepb.com
              http://www.powdercoatpb.com
              baz

              Comment


              • #8
                Re: need expert help

                I sand to 600 and then use emery on a hard sewn wheel and then white on a softer wheel. I never use sisal wheels, only cotton. Baz likes a green stainless compound on aluminum. As he said, everyone has their own personal favorites. I never use tripoli on aluminum; it is the compound of choice for brass.

                Richard

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                • #9
                  Re: need expert help

                  sounds good. I Appreciate the help. I guess its best to just experiment since all workpiece are different. I will try the emery on 400 first and then move up to 600 if I need to. I'll post pics of the results. Thanks again!

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                  • #10
                    Re: need expert help

                    I find it is important to use a hard sewn wheel to cut with emery, a wheel that has the spiral stitches very close together. If you use a soft wheel for this stage it doesn't cut very well; it just kind of polishes up the sanding scratches.

                    Richard

                    Comment


                    • #11
                      Re: need expert help

                      k ill keep that in mind. do you think a sisal wheel would be too agressive with the emery? also, i've been looking at die grinders vs rotary polishers mainly because they seem to be a better all-in-one tool. can fit different wheels/pads, higher rpm, and can get in tight spots with felt bobs only thing is they dont have handles like the rotaries do so im not sure if it would be easy to control. what do you recommend? my 3" polisher only accepts 5/16"x24mm thread and i can't seem to find an adapter for it that will take small felt bobs for those tight spots.

                      this is all i can find

                      http://www.activepowersports.com/tru...t-adapter-kit/
                      Last edited by exstaZ; 10-26-2013, 04:12 AM.

                      Comment


                      • #12
                        Re: need expert help

                        Originally posted by exstaZ View Post
                        k ill keep that in mind. do you think a sisal wheel would be too agressive with the emery? also, i've been looking at die grinders vs rotary polishers mainly because they seem to be a better all-in-one tool. can fit different wheels/pads, higher rpm, and can get in tight spots with felt bobs only thing is they dont have handles like the rotaries do so im not sure if it would be easy to control. what do you recommend? my 3" polisher only accepts 5/16"x24mm thread and i can't seem to find an adapter for it that will take small felt bobs for those tight spots.

                        this is all i can find

                        TRU TURN - TTE-0516-050-A 5mm x 5/16-24 E-Collet Adapter Kit - Active Powersports
                        each tool has it s use , the three inch polisher is slower and should have more torque to spin larger wheels . the die grinder spins much faster but usually has less torque and is well suited for smaller attachments like cartridge rolls .
                        i do use my die grinders with larger wheels like 4 inches but i run my die grinders at 150si so they wear out quite fast.
                        http://www.peintureenpoudrepb.com
                        http://www.polissagepb.com
                        http://www.powdercoatpb.com
                        baz

                        Comment


                        • #13
                          Re: need expert help

                          I don't think you will be satisfied with an air die grinder as your primary tool. I have never used an electric one so I can't say about that.

                          R

                          Comment


                          • #14
                            Re: need expert help

                            i was thinking air die grinders , the electric ones i have seen don t have enough torque or they were too heavy.
                            my air die grinders run at 150 psi so they give more torque but the high pressure destroys them faster .

                            the Tools i use the most when polishing are a large 3hp stand mouted buffer , a dewalt electric angle sander polisher , da sander and 1/4 inch die grinder .

                            for the kind of work i was doing most often (very detailed parts ) the die grinder was the tool that i used the most followed by the da sander and the large buffer
                            http://www.peintureenpoudrepb.com
                            http://www.polissagepb.com
                            http://www.powdercoatpb.com
                            baz

                            Comment


                            • #15
                              Re: need expert help

                              Yeah, a die grinder with a little 2 inch buffing wheel on it will really get some work done on small pieces. One good thing about air tools is that if you catch an edge, most often the tool just stops, whereas with a high torque electric tool it throws the piece across the room—if you're lucky.

                              Richard

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