Damage to glass-reinforced plastic construction is often not detected at an early stage; this can lead to expensive repairs or loss of value. Osmosis (gel coat blistering) is one of the main problems Tony Staton-Bevan addressed. His common sense advice on the prevention and cure of problems with hulls, decks and fittings, cracks and blistering, stress crazing, fading gel coats, and collision damage will help owners find potential trouble spots and repair the damage.