MST MST Hull & Fiberglass Repair 3

Question 1

When fairing a hull repair, fairing compound should be applied in how many thin layers?

Accepted Answer

Multiple thin coats, allowing each to cure

Answer

One thick coat only

Answer

Unlimited thick coats back-to-back

Answer

Only under the gel coat, never on top

Question 2

Which safety precaution is most critical when working with MEKP catalyst?

Accepted Answer

Wear chemical splash goggles and nitrile gloves

Answer

Work only in direct sunlight

Answer

Mix MEKP with acetone before use

Answer

Store MEKP in a warm engine room

Question 3

What is the recommended approach for repairing a through-hull fitting that has corroded and is leaking?

Accepted Answer

Haul the vessel and replace the fitting with a properly sized bronze or composite unit

Answer

Apply underwater epoxy putty from the inside while the vessel is afloat

Answer

Tighten the backing nut until the leak stops

Answer

Cap the fitting from outside with fiberglass tape

Question 4

What tool is used to cut out a damaged section of fiberglass hull cleanly for a patch repair?

Accepted Answer

Oscillating multi-tool or rotary cutter

Answer

Standard wood chisel

Answer

Drill press

Answer

Angle grinder with flap disc only

Question 5

What causes print-through on a fiberglass hull, where the weave pattern is visible through the gel coat?

Accepted Answer

Insufficient gel coat thickness over the fiberglass weave during original lay-up

Answer

Too much MEKP catalyst used during cure

Answer

Osmotic blistering beneath the surface

Answer

Antifouling paint applied too thickly

Question 6

After completing a fiberglass hull repair, what is the correct sequence of finishing steps?

Accepted Answer

Wet-sand, compound, polish, wax

Answer

Wax, compound, sand, polish

Answer

Prime, paint, sand, wax

Answer

Polish, sand, compound, wax