MST Hull & Fiberglass Repair Flashcards
6 cards from real MST practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 MST Hull & Fiberglass Repair flashcards as text
When fairing a hull repair, fairing compound should be applied in how many thin layers?
Answer: Multiple thin coats, allowing each to cure
Multiple thin coats prevent shrinkage cracking and allow proper cure between applications for a durable, fair surface.
Which safety precaution is most critical when working with MEKP catalyst?
Answer: Wear chemical splash goggles and nitrile gloves
MEKP is highly corrosive to eyes and skin, requiring chemical splash goggles and nitrile or neoprene gloves at all times.
What is the recommended approach for repairing a through-hull fitting that has corroded and is leaking?
Answer: Haul the vessel and replace the fitting with a properly sized bronze or composite unit
A corroded through-hull is a serious safety risk and must be replaced with a properly rated fitting after hauling the vessel out of the water.
What tool is used to cut out a damaged section of fiberglass hull cleanly for a patch repair?
Answer: Oscillating multi-tool or rotary cutter
An oscillating multi-tool or rotary cutter allows precise, controlled cuts in fiberglass without excessive vibration or cracking adjacent laminate.
What causes print-through on a fiberglass hull, where the weave pattern is visible through the gel coat?
Answer: Insufficient gel coat thickness over the fiberglass weave during original lay-up
Print-through occurs when gel coat is applied too thinly or the weave pattern telegraphs through during cure and shrinkage.
After completing a fiberglass hull repair, what is the correct sequence of finishing steps?
Answer: Wet-sand, compound, polish, wax
Wet-sanding levels the repair, compounding removes sanding scratches, polishing restores gloss, and waxing provides UV protection.