Originally Posted by
HI-TEK
Hi BBQJOE,
I think that you have just given me the clue, why things may not be working for you.
You referred to bubbling effect on coating.
This is telling me that there may be two possibilities going on,
1. Too much coating on first application. (possibly not)
2. You did not dry coating well enough before putting them into oven.
When considering item 2, solvent drying will chill projectile. This will attract moisture, and during the drying, coating also forms a skin, which does not let moisture/solvent dry adequately.
Placing them into oven at that point, will cause super heated steam vapours, which will prevent correct cure and bonding during bake and cause such bubbling effect as you describe.
First coat, only has to stain, and colour with fist coat is not important.
If possible, after first coat, raise temperature of projectiles about 2-3 degrees above ambient to reduce moisture pick up due to chilling occurring due to solvent drying.
(using a small fan forced heater will do the job but be very careful about flammable solvents and heaters)
Or simply, let it dry for much longer than you have previously.
Very thin stain first coat dries much quicker, and solvent/moisture entrapment is minimal.
Once you get correct bond of first coat, subsequent coatings should work fine.
HI-TEK