using a ponceuse vibrante or orbital sander to scrub surface intermediate fire proof paint before painting top coat

airbrush building coat coating color construction damage electric equipment factory field fire fireproof gun hand industrial industry intermediate job labor machine maintenance manufacturing mechanic metal object orbital paint painting ponceuse power production proof protection remove repair sand sander sandpaper scraper scraping scratches scrub site spray steel structure surface technician technology tool top vibrante white work worker workshop