Thanks Marq youre right I wasnt letting it cure I thought since it dried after a few hours I could paint again, big mistake i guess!

I was probably also leaving too much paint on the roller.

Also how long should one wait before wetsanding after having painted, 24 hours? Then how long to let the car dry after having wetsanded and cleaned the car?

Should one avoid painting when its raining because of the increased humidity in the air?