Originally Posted by
JellyJar
Did a quick experiment tonight. Put a pencil grid on the same side as the sharpie and spent a few minutes on some 80 grit. Pencil was gone in the same areas as the sharpie, so I don't think the sharpie will hang around. But even if it does I figure it will only affect it's looks. I then put a pencil grid on the other side and it wasn't really any flatter, so I'll stick with the one I started on.
Checked the website for the loose grit and I couldn't find the kits (the kits they had were specifically for mirrors and seemed a bit pricey). Single item purchases of the different grits in 1/4 and 1/2 pound packages is pretty reasonable. I'd think a 1/4 pound should be sufficient, but not sure. I've got a small medium ark that I might do once the memory of this one has dulled. So maybe a 1/2 pound?