get a flexible sanding block ... you can bend them all way's ... load it with paper and sand it til you get a smooth surface ,, then move up on the grit.. once you get to say around 400 grit you should have a dual satin look.... ( when sanding say with 300 go left to right then with the 400 go up and down..but do it with all the grit's ) when you get a nice smooth surface double stack 2 sprial load them with black and go to polishing you want to do it in the cut motion ...you will get a nice mirror shine clean your part... hot soap and water will work ... double stack two new or clean sprial's load it with brown .. repeat the cut motion till you get the tank done ... clean again rake out you wheel's load again now this time go in the color motion till you get a nice shine .... clean you tank again put on a cardboard cut out about 4" load 2 loose cotton on and load with white go in the color motion til you get a highluster shine ....the more time you spend with the black you will remove alot of your scratches that are left over ... the reason i put a 4" cardboard circle on with the loose cotton is to keep the wheel's from folding over to much ... if you want you can get some cotton wheels from caswell the one's that have one line sewn in and use the white on them then clean your part again .. and use the loose cotton and load it with red and go over it the red is moreless just a polish and has not cutting action to it ... it will bring out the shine in your part...
then more you do it the better you will get and the faster you will get .. if you need any help feel free to email me or give me a call .. all my contact infor is on my webpage... www.customandsound.com .... good luck