Fully cured means anything from 24 hours to 24 days at room temperature but the most common hand laminating epoxies often take a week or so to fully develop mechanical properties. Against ketones wich are very fast vaporising 24 hours is often enough, viping does not mean a bath. Denatured alcohol is not not the best fat solvent but it seems to work in most cases, it depends a bit on the denaturing agent used. (personally I prefer alcohol in a good wine)

In some severe cases I sometimes try the trick of mixing a bit of either ketone to the epoxy. It acts as an inhibitor to curing so it lengthens the pot life and seems to solve the oils into the epoxy layer -sometimes. The amount used is not very much and it should not be used in laminating. Also if used too much the epoxy layer tends to become porous which is not at all desirable-

TLM

: Hi Tapio;

: Thanks for the timely info - I had not realized that dishwashing soap might
: be a problem. I sure as heck will stay away from it.

: When you say "fully cured," I want to be sure we're on the same
: page: The surface is hard enough so that no indentation can be made with a
: fingernail, and sanding produces powder, not balls. Is this correct? At
: our temperatures (90's), this occurs in about 24 hours.

: What do you think of denatured alcohol? Is it not an aggressive enough
: solvent? I'll check and see if MEK is available locally. I DO need to try
: another approach . . .

: Thanks again, Spidey