This is a bit premature as I'm not ready for colors yet, but I want to be prepared when I start.  Base coat will be white with lots of red and black trim applied over the white.  Normally after I mask for trim, I spray a very light coat of clear to seal the edges of the tape so there is no trim color bleed.  Now I have also just used a light mist coat of the trim color itself for this, but clear insures crisper lines as even the mist coat can bleed under sometimes.  So, if I'm using Rustoleum for colors, what clear spray can I safely use to mist the trim areas before applying the colors ??  I obviously am looking for something that is compatible with the trim colors so I don't get any bubbling, lifting or alligatoring (is that a word ?).

Again, thanks in advance for any suggestions or knowledge.