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Cultured marble: possible to buff out scratches?

Posted by tomatofreak (My Page) on
Sun, Jul 20, 14 at 2:04

I bought a used, but very nice, vanity with a cultured marble top. There appears to be one section with surface scratches. Is it possible to buff those out? Any other means of shining it up?

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RE: Cultured marble: possible to buff out scratches?

For real scratches (gouges) you will need a selection of wet/dry sandpapers of various grits, up to 2000. The coarseness you will need to start with varies based on how grave the scratches are. Start with a fine grit like 400, if that oes not get the scratch out, you will need to use more elbow grease or a coarser paper, but you have to then work up to 2000 and not skip any grits in between. 400-600-800-1000-1500-2000. There are finer papers than that, all the way up to 15,000 and beyond that is the polishing compounds.
You can buff it out with auto polishing compound or the kits made for rejuvenating plastic or fiberglass gel coat. Cultured marble is basically a polyester resin with stone dust mixed in.

RE: Cultured marble: possible to buff out scratches?

I get this call all the time. No, it's not really possible to buff scratches out of cultured marble. If it were, I'd be rich.

The problem is if you abrade through the gel coat, you're screwed. You can't apply more gel coat and you'll never get the abraded area to match.

RE: Cultured marble: possible to buff out scratches?

If you use a light car buffing compound on a high speed buffer you should be able to get most of the scratches out depending if the scratches went all way through the gelcoat. The friction from the high speed buffer should heat the gelcoat enough to make it pliable. I would try that first.

Here is a link that might be useful: the DIY resource

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