rattle can engine paint????

Got my Mopar Performance Turquois from Jegs for 9.99 a can! Comes out Shiney too! Took 3 cans for my 400.
Someone used that Por-15 on the entire floorpan in my Cuda and the crap is peeling off. Did some bodywork and was blowing the dust out with a blowstick and blew smooth off! Crap I say. Now I gotta get it off and use the Rust Bullet.