Hello!
I always recommend glueing as much stuff as practicable before painting (and it's a lot). Sometimes it's better to leave a subassembly off, but it's mostly when the partition is practicable for glueing.
When the joint is OK I scrape the paint away and use lacquer thinner for glueing. Sometimes I take CA (risky!) and for things like chrome emblems on a high gloss finish there's nothing like white glue - because you can was it down when it gets where it doesn't belong.
Some setting time is desirable to allow for corrections when glueing and maybe some cleanup should something go wrong.
I heard, that light (UV)-hardening resins, like those used in the dental industry are latest fashion now - didn't try any yet.
What do you mean by "hot action glue"?
Good luck with your builds and have a nice day
Paweł