Originally Posted by ELEKTRIK_BLUE;13824144
i dont need to ask the guy at Sherwin-Williams who handles auto shops because sherwin-williams doesnt specialize in automotive paint. i work in an auto and motorcycle shop. i do most of the machining and all of the painting. i dont need to argue this fact because it is pointless. i never mentioned flat enamel at all i said primer so stop twisting my words. the freaking can says primer its primer. the part number on the shipping containers matches up with the company's primer part number enough said. im sorry but im gona trust the guys at coast airbrush who do mostly automotive paint to give me the right stuff especially since i went to school with most of them.
SIDE NOTE: im not starting a war over it. im not being disrespectful. so im dropping it and leaving it alone ive made my point if you wish to carry on its all on you bud.
This. He's right. How should I know? I spent 7 years painting cars professionally.
Originally Posted by Solarin;13852156
Primer is, in many cases, over-sold on its sealant properties. Its main function is to provide a surface for paint to solidly adhere. Given enough time the sealant properties attributed to it fade, which is to be expected. This is just a fact of the chemistry. However, given that it has been just a month, go ahead and clean the surface thoroughly then paint your topcoat. I honestly wouldn't bother sanding. If your primer coat was applied thickly enough and evenly enough it will do its job.
The only thing that would require you to sand that primer off and redo it is if it oxidized or was exposed to sunlight for a long period of time. I will tell you that if you don't sand the primer first (or at least scuff it with a scuff pad) you run the risk of the paint peeling off it later.
Here's my suggestion: Read the can that the primer came out of.