If threads are partially stripped, an inexpensive solution is to put some copper threads in the hole and then insert the screw. You can get very fine copper strands out of almost any stranded wire, but look for 22-24 gauge.
On the paint - I used to love Krylon. Then about five years ago they changed the formula and the nozzle, making it useless for airplane parts and model train parts. So I went to Rustoleum, and for a while that was satisfactory. Their new formula dried as fast as the older Krylon.
Now every single can of Rustoleum I buy clogs on its third or fourth usage. I have tried everything - compressed air back into the can, cleaning the nozzle with very fine wire - everything. I have a huge stack of mostly full useless Rustoleum cans. I am considering shipping them to the company president.
I am currently having really good luck with "Dupli-Color". When I want really, really good results, I mix my own and use an air brush or a Binks model 18. But sometimes a good rattle can is indispensable!
