Primer

The primer coat (1 coat/day for three days) had to be striped off bc anything scratching against it took the three coats off down to the black plastic cup holder. I did prep the surface if the plastic with fine steel wool but the 1st primer coat was extremely rough and required another round with the steel wool. This may all be on me but it seemed easier to strip off the primer, re-prep the plastic surface and and start over. Any suggestions would be appreciated.