primer

I allways prime my models to expose any spots that needs to be filled and sanded. If you are applying a new coat of paint with airbrush or rattle can you don't have to wait 2 days, but I would wait more than 15 minutes, wait 5-6 hours.
Its when you are applying washes and drybrushing that you need to wait 5-6 days.

What i need to know is since there both enamels do i really need to wait 48 hours between the primer coat and top coat? The can says within 3 hours or after 48 hours to prevent wrinkling. Does it make a differance since 1 says primer on the can and the other black paint? Or would the black paint be fine for a primer coat? Thanks

If i wait an hour or so to paint the black paint on top of the gray primer,will the colors bleed or will i be alright? as you can tell i'm an amature. Thanks p.s. (there both Testors enamel)

QUOTE: What i need to know is since there both enamels do i really need to wait 48 hours between the primer coat and top coat? The can says within 3 hours or after 48 hours to prevent wrinkling.

Just because paint is dry to the touch does not mean that it has completely cured. The surface dries first, but it takes longer for the lower depths of the paint to cure. Also, as paint dries it loses a lot of its volume and contracts. Notice how heavy and wet it can look right after you spray it, covering a lot of surface detail. After it dries it is much thinner and the detail returns.

The longer you wait the better, but wait at least several hours before painting on top of it. If you don't it will just take even longer for the primer to cure fully, and once it does you run the risk of the top coat cracking because the paint underneath it contracted as it cured.

QUOTE: Does it make a differance since 1 says primer on the can and the other black paint? Or would the black paint be fine for a primer coat? Thanks

Primers are typically flat (as opposed to gloss) and normally have much finer pigments than regular paint so that they don't cover up surface detail. Also they are pretty "Hot" so they cure quicker than other paint.