If there are straight pieces , flat long brass or aluminum slats can be glued to straighten it out from the inside. but usually if you use 30 min epoxy (I use whatever brand- the kind in the clear plastic applicator in 2 parts) and then clamp the parts of the body with ALOT of clamps overnight, tht should really bring it back to form.

I always use epoxy on heavy large parts on resin. CA is fine for smaller joints and flat medium parts.

i hope that helps.

Always keep some epoxy around when using resin. but for other non warped or medium parts that need epoxying a simple 5 minute kind is perfect.