I usually drill some holes on the surface where I want to add stuff on, so that the sculpey or epoxy have a rough surface to stick better on. ~Michaelsng

Just do whatever you can with your hands before going to smaller detailed tools. Cocktail sticks and scalpels are good. If they are moist, it works better. ~Michaelsng

"but ones fingers cannot make epoxy bolts small enough" Make epoxy snakes. . Round the ends. . And cut off with razor-blade. . Or use sculpey and scorch with lighter. . ~PopeRocket 

When I used it on a body part, I found where I'd trimmed down the sprue stubs had collapsed slightly around the edge of the injection point, then erupted up through the center. Tiny little craters here and there I'll have to clean up. Not severe enough to mangle the body, but enough to make it look kinda unfinished.

If you're covering the sprue attachments, I'd say you won't have to worry. If you're cooking a part and leaving the nubs uncovered, you might want to do a little cleanup afterwards, or break out a fresh body and leave it untrimmed until after baking. ~NutjobGTO

I mold whatever I'm going to put on my stikfa on an extra peice or unpainted peice of stikfas drop it in a coffee mug with enough water to submerge it then pop it in the microwave for like 2 mins til the water is boiling.  Take it out, remove it from the peice of stikfa, let it dry and glue it where ever its going.  No baking required or melting.  Boil it baby! ~Greg Falcone  ( Maestro)