I had a cute metal box (very small) that I wanted to paint with craft paint. I cleaned off the metal top with alcohol before I did anything, then painted it with outdoor gloss paint. My thinking was it would take 3 coats. Well, I am on coat 4 and it still shows the original painted colors and words. Yes, I did let it dry about 45 minutes between coats. (I run a dehumidifier for health reasons so it should have been dry)

What should I have done to have my craft paint give better coverage? This is something I want to do again.
Thanks,
Monica