You can now buy 2K primer (even 2K epoxy primer) in a spray can. It has a special activating button that mixes it, and once mixed is good for about 24 hours. It costs big bucks--about $20 for a can. But if you need to do a relatively small panel, or small parts, and want real primer coverage in 2K form (which is really what is needed for a proper base), it sure is handy. There are a couple brands out there, but the one I've used successfully is called SprayMax. If you google it you will be able to shop comparatively.
