first answer is yes use windex with ammonia to activate the adhesive on the covering after the airplane is covered and you want to put on trim:
1. cut out trim pattern
2. wet trim and airplane where you want the trim to go with windex
3. apply trim and move it around until you're happy
4. squeegie out excess windex
5. allow to dry
6. go over pattern with a monokote or trim iron on low heat.
7. you can seal the edges with clear fingernail polish, however sometimes on high humidty days the polish can get kinda milky

to answer the 2nd question I never use CA hinges, just my opinion.