I just finished spraying them with Lustrekote. It works beautifully. Since I found the "High Quality" button in my new printer's options, I made another sheet, so I had a test sheet. I dusted it with spray once and no problems appeared, so in a few minutes again. Then once more, and it looked good, so I did the same to my good sheet. It has a nice clear glossy covering now. It's pretty cool in the shop so I have a space heater blowing on them, and I'll try one tonight and see how well they work.
Just to see what would happen, I clobbered the test sheet with way too much spray, and it didn't phase it. They may not release, but they sure are shiny. Good to know, L'kote works and they're fuelproof. Thanks for all the replies.
Rusty