Refinishing composite counter top

[Zogman]

I purchased some cabinets and counter tops from a lab a few months ago. I had to store the counter tops outside and they have gone from black to a whitish grey. These are heavy suckers and are at least an inch thick. Wondering what would be the best way to get my nice black surface back. I was thinking of wet sanding with 600 grit but was hoping someone here would have better info.

Thanks

Zoli

 

[MrBlue54]

If these are solid you can use an orbital sander to restore them. Depending on the gloss or satin finish will depend on the sand paper you use. Gloss will need something in the 600-grit range. Just make sure they are laminate with particle board underneath. Good Luck.

 

[nadogail]

IMHO, the preferred method will depend on the kind of composite countertop you have. In my home, the composite countertops are ground quartz in some kind of resin. To the best of my knowledge they would be relished just they were made of natural granite.

In my case, I would, with my limited specific knowledge and specific experience, call in the same professionals who fabricated and installed them.

Now if the composite countertop is a plastic material similar to Corian, I would try refreshing the surface with sandpaper and rubbing compound.

If the countertop is a laminate, similar to Formica or Wilsonart, I would probably consider replacement rather than trying to sand a very thin layer of plastic laminate.

 

[kbs2244]

The lab tops I am familiar with are a chemical resistant, almost stone like, stuff.
But they would be UV resistant also.
In your case I would start off softly and get more aggressive as needed.
Baking soda and a ScotchBtite pad would be a good starting point.
Move up to scouring powder if needed.