Thanks for the response.
I have the long skinny access door but someone broke the hinges on it to get it off so I'll either have to fix the hinges or re-create them.

When I sand blasted the access door it seemed like it had a white primer then a layer of teal or light blue and then all those other colors that are peeling off. Maybe when I blast the big panels a logo will show up buried under all those colors. One can hope.