[Striperhound]

I primed some plugs this weekend with Rustoleum Painters Touch Sandable Primer. Let dry for 24 hours then light sand and dusted off with tee-shirt. Today I Painted in light coats of Rustoleum Metalic Finish. The Primer started to bubble up like when you put paint stripper on old paint. What do you think caused this. I did one needle and it came out fine. The next needle it bubbled up?

Thanks