Paint Experts: Process Advice Needed

He is right. Regular spray bomb primer works and looks OK, but it will allow moisture to pass through. If you do not have the ability (compressor - spray gun - etc.) to spray epoxy primer, I highly recommend the Eastwood Epoxy spray cans. They cost about $20 each, but they are a good alternative. Then have a vial inside the can that releases the hardener when you strike the bottom of the can. No mess, no fuss, and no cleaning the spray gun when you are done.
Thank you! I do have the equipment to spray epoxy primer, so that's no problem. Everytime I've tried to sand epoxy primer in the past, it's clogged the sand paper. I suppose I can cover it with some type of surfacer, but I don't plan to body work these panels since it's just the inner deck lid and jams. I'm just looking to cover them until I'm ready to shoot some sealer and paint them in a couple months.

Is there an epoxy primer that I could use now that won't be such a bear to sand in a few months when I shoot the sealer/paint?