EFG-1 the only specially formulated eco-friendly fiberglass cleaner you need. Safely, quickly and easily clean fiberglass surfaces like showers and baths. Green Blaster Fiberglass Stain Remover is ideal for removing stains, rust and other stains on showers and tubs - excellent also for cleaning fiberglass indoor or outdoor furniture. Non-abrasive and safe to use on white painted surfaces as well as gel-coat fiberglass, requires no sanding or compounding, just apply with a brush, cloth or sponge, wait a few minutes to allow it to work on the stains, then rinse the eco-friendly EFG-1 off with water or wipe with a clean cloth to leave fiberglass and gel-coat surfaces sparkling clean.