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Originally Posted by ptim
Is a 8" pad better than a 4"-6" pad, or is bigger better. Also, are more expensive pads better, after using my grinder with a 4" kind of cheap pad, I noticed that I had tiny strings all over me.
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The strings and dust are normal, however as mpierich pointed out I am using angle polisher / sanders not grinders, and they are variable speed.
DO NOT run wheels bigger than 4" above 3000 RPM's
Its bad for the wheels, the machine, and the part you are buffing and it could hurt you as well.
Valve covers are often the worst castings you will ever see.
I am always disappointed that they don't come out brighter for the amount of work they require. You can almost never get the kind of reflection that you can read the newspaper in. Castings are made of a million pits, I always tell people it's like slicing Swiss cheese, and no matter how many times you slice it you are always going to have the holes.