Hello, is it just me or anytime you use a rattle can to paint with the finish product never is the same then if you had used a gun and compressor? For example, I removed the cars radiator cleaned it up primered it and plan on spraying a couple coats of hi-temp gloss black. But I know from past experiance even after the paint has had a day or two to dry that you can still run your finger nail along the paint and leave an impression. I don't expect factory quality but I would like the finish to with stand normal everyday abuse. Any suggestions or ideas what I might be doing wrong?