Technical 1950 Chevy vent windows

I recently took my door vents apart and getting ready to put them back together I primed the frames is that good enough or should I paint more over it?

Second I need to put the small brackets back on that require the tubular rivets I got the rivets but how should I go about pressing them on?

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use a clinching tool?

 

Primer is porous, I would apply some paint.

 

Thanks I'll add more paint

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could you contact me im looking for the upper vent window bracket