Steps I took:
1. Machine sanded dry at 320 grit
2. Cleaned with Dawn Powerwash
3. Cleaned with neat Simple Green.
4. Dried with paper towels
At this point the metal was squeaky clean and the paper towels were clean looking.
5. Sprayed with Rustoleum Self-etching Primer, several coats. Air temp was around 72F
6. Waited 24 hours
I could still scratch the primer with a fingernail but decided to try wet hand sanding 320 grit anyway. And... it's just coming off.
So where is my mistake? I know I now have to sand all of this off but what should I do differently the second time around? Next time I will just do a test area first.
First pic below is before priming.
Thanks, Andy
1. Machine sanded dry at 320 grit
2. Cleaned with Dawn Powerwash
3. Cleaned with neat Simple Green.
4. Dried with paper towels
At this point the metal was squeaky clean and the paper towels were clean looking.
5. Sprayed with Rustoleum Self-etching Primer, several coats. Air temp was around 72F
6. Waited 24 hours
I could still scratch the primer with a fingernail but decided to try wet hand sanding 320 grit anyway. And... it's just coming off.
So where is my mistake? I know I now have to sand all of this off but what should I do differently the second time around? Next time I will just do a test area first.
First pic below is before priming.
Thanks, Andy