Here is what I do.
1.) Wash the Resin and clean the moolding pieces, flash and moldlines off.
2.) Identify which parts need to be pinned together for extra stability
3.) drill the holes and add the pin.
4.) Assemble the parts with 5-minute epoxy glue,
5.) Fill the gaps with epoxy putty, NOT the 2 stick epoxy putty.
6.) Prime the Kit. Best primer what is that??
7.) Paint the kit, take your pick. Remember you are painting on top of the primer.
The orange on the prominence, I think your best bet might be multiple light coats of clear orange over a white or whitish metallic base.
HTH.