I'm glad this helps! Resin is not too hard to work with, but requires "cleaning up", as most bodies and parts have varying amounts of "flash" or excess material from the casting process. This is usually easy to take care of by removing the flash with a hobby knife and sanding sticks (work slowly and carefully). You might also find pinholes and other minor molding defects that need to be filled with putty. Always clean the body and parts before starting any work on them by putting them overnight in a small plastic tub filled to cover the body with something like Westley's Bleach White or Purple Power (careful, use rubber gloves) to remove the molding release. This is a film that prevents the resin from sticking to the mold, but also prevents primers and paint from sticking to the parts. Also, always use superglue or epoxy on resin; regular model glue for plastic won't work with resin. If you do a search on this forum, you should be able to find additional info for working with resin.
Good luck with your project. I'm sure your brother will be thrilled!
Fernando
P.D. Very nice and clean builds!