Metal Finishing

My go to surface clean up before powder coat is a 40 grit flap disc. Usually just a little cleanup of the 14 ga HR pickled and oiled steel is all it takes. Sometimes I have some large areas and I would like to remove 99% of any marks before powder coat.
Do any of you use this tool for surface cleanup and what wheel do you use?

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I have the Harbor Freight version of that and its awesome. It removes powder coat better than anything I’ve used and also does a great job giving metal a brushed look.

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I have the Eastwood SCT Contour. I use the 40 grit abrasive drum to get surface cleaned up then an 80 or 120 grit interleaved drum to finish prep.


What kind of drum do you use what grit?

What material is that? Aluminum oxide drum? Thanks for the info
Also…how long does the drum last you about how many square feet can you final finish per drum?

You can look at the drums on the site search under SCT Contour. There is several You Tube videos as well on these units.
The abrasive drum is like a hard plastic material. If you happen to catch a sharp edge it will chew it up somewhat. I have striped paint, powder coat and hot rolled with it successfully. It has been said you can strip 1/2 of a car of old paint with one drum, but that might be a stretch, the way I use mine anyway. They offer a narrow version as well, which requires a couple adapters on the tools shaft. The same material can be found for angle grinder discs. I like them as well for more hard to reach places.
The interleaved drums in a 120 grit leave a nice finish for painting. I have conditioned some aluminum to a pretty shine with a 320 grit drum.

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I use the 40 grit. They’re 20% off this weekend at HF.