Auto paint primer sealer?

I have a car that i did some body work on. I wanted to find out if i used primer sealer, do i spay just the worked area or i can spray the whole car with it.Auto paint primer sealer?
i own a repair shop,and we do some paint work also,you can spray the whole car with it,if you have it ready,but if not id just spray the area i repaired for now with it,because the surface does have to be prepped in order for it to bond right ,good luck,i hope this help,s.Auto paint primer sealer?
youyr welcome.

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You can spray the whole car with primer, but if you do be sure and use the sand-able type in case you want to more work prior to actually doing a paint job. If not ready to paint just spray the area you worked on. The main purpose of a primer is to seal the metal to prevent further rust prior to painting and to give the new paint a better surface to stick to.