Quote Originally Posted by Oakeshott View Post
Where are you located? You can get some SiC powder in 400gr for about 5 bucks off eBay here in the states and it will make short work of nearly anything. You could then use 800 or 1000gr w/d to finish the surface.

Very curious about that rock. Please let us know what you find.

Norway, can see they sell it in germany...