I used Duplicolor High Build Primer that I bought at the auto parts store. When you pull up the chart tape, the adheisive backing sometimes does like to stay in the groove on the plane. I made a small scraper from an .05 allen wrench which I ground with a ceramic drum on my dremel. I use it to scrape out whatever stuck in the groove, being careful to not scratch through the fiberglass. It took about 2 - 3 coats of high build primer and I pulled the tape off about an hour after spraying the last coat. I missed a couple of pieces of tape and discovered them several days later, and still had no (more) problem pulling it up.

Scott