I top coated with a high gloss ,(i wanted a gloss finish)
clear water base polyurethane. If you pour 15% directly
on the finish , it will soften, don't wipe it , let set for a while
then clean up with Windex.

The finish stands up very well to exhaust . One of the most
important tips when using latex is to make sure it's
completely dry before masking etc. allow 72hours min before
letting it see fuel

I'm not sure if there is a difference between trim and
house paint, but the trim paint is available in quarts.

I suggest that you do a search on "latex paint"
you will find many links with highly detailed info

Hope this helps
Roby