Testors and "sticky" look?

Testors would work fine... their Models MAsters line is a good selection... a lot of good paints in it in a large variety of colors... my take is try the MM color, if you dont like it move to another... The only one I have heard issues with is the Tamiya acrylic line (for hand brushing) but I think if properly thinned even these work ok. The keyword is properly thinned for any paint type...

Get some thinner. I use lacquer thinner but any solvent thinner will work. Keep a little cup of it nearby (like a plastic soda top) to dip your brush in every few paint strokes. And keep a napkin nearby to dab off excess. You'll see that it helps.