I am about to install trim cote and decals on my Phoenix Extra330S. Two questions in this regard

1) Is there any technique to installing the decals? As far as I can see, they are only stickers

2) Is there a convention to installing the wingtip trimcote? i.e. when standing across the tail, which wing should be red andd which some other color? I plan to yellow the underside of the wings for better visibility as it is gray right now

Ameyam