To be completely honest i'd say get rid of it now! I would happily take it off your hands to safely dispose of it!
The resin seems pretty thick grade so i don't think too much reshaping will be needed, maybe on some of the fiddlier parts. All the ones i've seen haven't had TOO many issues... Yet...
There will be gaps to fill though like most models.
Can't help you with the retention, but i assume most bits won't need anything to hold it.
All this comes from no experience so i may be wrong, but this is just what i think. Also, my offer still stands...