The coil springs are complete. I got the second coat of paint on them just a little while ago. So far I have put about 5 hours into refurbishing the springs.
Before applying the first coat yesterday I had to re-clean the paint gun. Apparently last time I used it I did not clean it very well. Of course I did not realize this until after I had loaded it with paint and it clogged up. What a mess.
I have completely disassembled and reassembled this thing 3 times now. The complete breakdown is not necessary to clean it good but I didn't realize that until I had it apart the third time. It turns out cleaning it correctly doesn't take any longer than doing it per the instructions, which is apparently not sufficient.
I suppose the manufacturer would prefer that you just replace the entire assembly every now and then. The paint gun in question is a Harbor Freight special, a $9.99 HVLP detail spray gun. So far it has worked well, despite my attempts to mess it up. No drips or runs, knock on wood. If I ever see it on sale again, I will consider purchasing a spare.