[Sharkbait40]

Hello - I have an aluminum cabinet that I got at the swap meet last week. It's a big GE Traffic control box. It had one layer of school bus yellow on it which I was able to remove with some A/C Stripper and a paint scraper. It has another layer of black paint or something that doesn't to bubble up like the yellow paint did. I know I could take it to someone to blast it but, my funds are limited for this project so I'm trying to do it on my own. Any ideas as to how to remove the old black paint as the stripper isn't working?

Thanks, Russ