: Nonyl phenol. I'm sure there are other things...but I can't find them right
: now. Generally I don't think it is a good idea to thin epoxy...even though
: it is thinned straight from various suppliers. The more thinning agent
: that is used the more the epoxy will shrink. There are other issues as
: well, but this is all open to discussion.

I was having a lot of trouble with fill coats going on and having a curdled appearance instead of a uniform smooth surface. I added a small amount (5%) of laquer thinner to the epoxy and also wiped the surface with thinner before applying it and it created a wonderful, smooth surface. What are the consequences of the epoxy shrinking because of the extra thinning agent?