How do you get burn marks out of fiberglass bath tubs?

Answer 1

If they don't come off with a mild abrasive, you probably can't get them off. You may instead be able to refinish the bath tub. Check at your local hardware store for options.

If you want to take it on, read up on fibreglass repairs. You will need to remove the tub and repair it from the underside. You will need some fibre glass cloth and a two-part epoxy resin. You will also need to feather sand the inside and possibly put one or two plies on the inside. Repainting never works in tubs and showers using normal paints. You will need a two-part epoxy paint. A heat lamp is also beneficial in the cure cycle for all epoxy resins and paints. The two parts of any epoxy system are the base and the catalyst or hardener. Once mixed, you will have a set time (depending on the manufacturer's instructions) to work with it before the hardener causes the base to gel. This is known as the working life. After it gels, it must be left untouched until the cure time is up. Once cured it should be hard to the touch, not tacky.