Author Topic: Electric sander/polisher or an air sander for paint finishing?  (Read 1533 times)

Offline soooty

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Have finished painting car and rubbed down with some 800 grit by hand. I dont want to do anymore wet sanding by hand. I see you can get 1200, 1500 amd 2000 grit 6inch sanding discs but don't know what sander to get. The electric ones seem very expensive £50-£100 for somethin decent. Looks as though the rpm can be easily set with an electric sander/polisher. None of them seem to have da function though except for ones that work over 4000rpm that would be no good for polishing also.
Anyway, since i have a compressor i thought it would be cheaper to get a da air sander, these are much cheaper £15- £40 for what looks like good quality ones. But i dont know whether they are suitable for finishing paint with 1500 grit and also for polishing with foam pad and g3 as there max speeds are about 10,000rpm which obviously would burn the paint. presumably i can just set the regulator on my compressor to lower pressure and only pull the sander trigger a small way in to get lower speeds.. but doesn't that mean i am guessing what rpm the sander is working at all the time?? will that work?
Very confused !! appreciate any help ta.

Offline Thom89

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Re: Electric sander/polisher or an air sander for paint finishing?
« Reply #1 on: 16 December 2009, 00:30 »
Have finished painting car and rubbed down with some 800 grit by hand. I dont want to do anymore wet sanding by hand. I see you can get 1200, 1500 amd 2000 grit 6inch sanding discs but don't know what sander to get. The electric ones seem very expensive £50-£100 for somethin decent. Looks as though the rpm can be easily set with an electric sander/polisher. None of them seem to have da function though except for ones that work over 4000rpm that would be no good for polishing also.
Anyway, since i have a compressor i thought it would be cheaper to get a da air sander, these are much cheaper £15- £40 for what looks like good quality ones. But i dont know whether they are suitable for finishing paint with 1500 grit and also for polishing with foam pad and g3 as there max speeds are about 10,000rpm which obviously would burn the paint. presumably i can just set the regulator on my compressor to lower pressure and only pull the sander trigger a small way in to get lower speeds.. but doesn't that mean i am guessing what rpm the sander is working at all the time?? will that work?
Very confused !! appreciate any help ta.

800 grit is far too coarse! wet sanding should start with 1200 then 1500 then 2000, a more accurate finish will be achieved by hand finishing, electric polisher is the best, with a 3M compound polishing mop head, and Farecla cutting paste....
Thom
« Last Edit: 16 December 2009, 00:40 by thom89 »