Re: wet sanding? Something I dont get
Going from 250 to 800 won't yield good results.
I don't know if grit sizes over there are the same as here but if not, you should be able to find a comparison chart somewhere.
Basically, it's the same as with hard wood. Start with 120, then 180, 220, 320, 400, 600. You can go finer if you like but it probably isn't necessary. This will not give you a highly polished surface. It's a prepolish. The usual final treatment for alabaster is a wax polish, preferably micro-crystalline, like Renaissance Wax.
It may be possible to buff alabaster, but you would have to look into the various buffing compounds to see which are appropriate. Also, buffing by hand is extremely tedious.
Rule number one for any kind of sanding: let the abrasive do the work. Alabaster is a soft stone. If you bear down too hard with the coarser grits, you may find it difficult to remove deep scratches with the finer ones.
Rinse the slurry off the paper frequently, and if the paper stops cutting, use a new piece of paper.
I'm not absolutely certain of anything, but more certain of some things than others.
Last edited by musket : 08-22-2018 at 04:47 PM.