[troy-curt]

Primer is only a filler. ALL GOOD PAINT JOBS SHOULD BE SEALED With a actavated urathain sealer,perferably with color added.
when paint is applied the thinner must evaperate up out of the paint, primmer is soft and pulls the thinner down into the primer and filler, the paint drys on the surface and the thinner is traped underneath. It will then come up through the paint and make little bumps and bubbles.
The more thinner that evaperates out through the paint during the drying process, the shinner the paint will be.
I hope this helps as it is a complacated process
Good Luck

 

[troy-curt]

Dragon is right,Every one has there own way of doing things. And you should do it however it works best for you.
However I knew a gal that didn`t have a bellybutton,lol

 

[troy-curt]

It takes a flexable two part filler.
Should be able to get it at any auto paint supply.

If you screw up your sealer, just sand it smooth.