Boat and marine restoration basics

Marine restoration is as much about keeping water out as it is about making things look good. Whether you are working on a wooden launch, a narrowboat, a yacht or a GRP cruiser, the same principles apply.

Hull and structure first. On a wooden boat, check planks, frames, ribs and the backbone for rot and worm damage. On GRP, tap the hull to find delamination and check for osmosis blisters below the waterline. Fix the structure before any cosmetic work.

Engine and drivetrain. Marine engines live in a damp, salty environment. Overhaul the block, replace the exhaust elbow and heat exchanger if they are corroded, and service the stern gland, propshaft and bearings. Rebuild or replace the fuel tank if there is any sign of contamination.

Electrics and plumbing. Every wire, fuse, switch and connection needs to be marine-grade. Replace old flexible fuel lines, bilge pumps and sanitary hoses. Keep the bilge dry and the batteries secure and ventilated.

Deck fittings and rigging. Stanchions, cleats, windlasses and guard rails should be bedded properly and re-fastened into sound backing. On sailing craft, have a rigger inspect the standing rigging and replace anything suspect.

Brightwork and paint. Varnish is beautiful but demanding; keep it on the high-maintenance areas and use quality marine paint elsewhere. Prepare all timber properly — stain, filler, sealer and then varnish in thin coats.