These worktops are all fitted in my kitchen, and have been oiled as instructed. No real problems with them but they are difficult to wipe clean succesfully, crumbs and stuff are ok but they seem to attract and hold onto dust (they are not freshly oiled and not sticky to touch). I am working throughout the house on other repair jobs which create more dust than usual and I have no door on the kitchen at the mo, I am not a case for Kim and Aggie! Can these be matt varnished or will the oiling have made this impossible, or do they need to be left so they can be re-oiled?