Photo by¬† @KimKelly on Twenty20.com Fiberglass is an excellent strong and durable alternative to ceramic or metal bathtubs. Bathtubs with weak support or those exposed to heavy use and abuse can develop unsightly cracks over time. If left untreated, these fine cracks can develop into larger or deeper cracks affecting the walls or floor of the tub. A good fiberglass repair kit will allow you to repair these cracks before they become a major problem. First of all, you should…