Thank you for reaching out and sharing your experinece! When applying Rust-Oleum Stops Rust Protective Enamel Spray Paint over a new paint or primer application, it is essential that you are checking the recoat time for that paint or primer. Most of our sprays need to be recoated within 1 hour or after 48 hours. If you sand before applying a new coat, we recommend waiting another 48 hours. This is done to prevent wrinkling, which sounds like what you experienced.
- Rust-Oleum Product Support 3