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Originally Posted by Mountain Heritage
Both of what Matt and truckntran say makes sense.....So for the wire cup brush on the drill or grinder - is there a specific one you use? I have only used one in my life and it did a crappy job on the piece I wanted to remove rust from. Do they come in different thickness/coarseness?? Would you use a brass one vs a steel wire one?? Is there a better choice depending on which part your working on? I just know when I clean my saw blades with a small brush - I use a brass bristle brush, softer and does a great job cleaning the pitch off them in no time and doesn't screw up the carbide tips. Didn't know if you had to be this particular when cleaning up the sheet metal or if you could scuff sand any scratches out of them easily?? This is all new to me - sorry for asking so many odd/dumb questions!
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If you use wire brushes you want soft wire like brass.I wish I still had my grandsons truck hood he went after with my grinder and steel wire brush I'd post pics of a destroyed hood ! there are several tools made just for stripping paint off sheet metal you might want to ask at a body shop supply(paint store)be very careful with power brushes its just as easy to warp tin with a power grinder/sander as it is sandblasting if your not very careful and you won't notice your doing it as quick with a grinder.