Best suggestion i Can give is a good industrial barrier cream. Like Rosalex but more modern.Better for Elf'n safety too.Use cocktail sticks or splints of wood to apply small amounts of glue etc. You can't be that bad if you're on the 3rd build though.We all suffer for our hobby like that to some extent . I well remember biting balsa and plastic cement off my fingers. Barring solvents ( Chloroform ,Ether , Acetone,Celly thinners etc) still the best way to shift it. Also use disposable
tweezers to handle small parts or steel ones you can scrape or burn off Good luck John.๐ P S I found a liquid called Plastic Magic. It is applied to the closed( close fitting )joint with the tip of a fine
brush. Just a drop. It shoots along the joint by capillary action. Gravity helps too.๐ค. I've yet to find a plastic it won't glue/join.brilliant stuff. regards holding things steady to dry many things can be used. Pins,bulldog ,clips,clothes pegs, steel blocks,Lego type blocks