I have a 8" bench grinder and I want to do some buffing such as on metal parts(knobs),plane irons,chisels etc.Are all the buffing wheels the same,and just the compound makes the difference?Do I need different wheels for each different compound.My first project is putting a shine on some knobs that is what I think to be an alu metal and my hand wheels which is cast iron.Both of these is on my table saw which I am in the process of restorting.Since I'm going to purchase these items for doing the saw,I also want to do all of my chisels and plane irons and maybe the lathe tools.I never done any buffing before so how do I go about this?Are there any websites someplace that can teach me the how-to's & don'ts of buffing?Thanks Guys---Carroll