From osmosis treatment to collision damage repair — I work with fibreglass properly. No filler over filler, no shortcuts that come back in two seasons.
Osmotic blistering in GRP hulls is common and well-understood. What varies is how it's treated — properly, with the hull dried for long enough and the barrier coat applied in the right conditions, or quickly, in a way that looks fine for a season and blisters again. I only do it the first way. It may take longer to schedule. It's worth it.
Collision damage, delamination, keel sump cracks — repaired to original laminate schedule, not filled over. Work is vacuum bagged where appropriate. No shortcuts that come back in two seasons and cost more to fix than the original repair.
Oxidised, stained or scratched gelcoat professionally restored — cut, polished and protected.
Awlgrip and International Perfection applied for a hardwearing gloss finish that lasts years.
Scrub, sand, and apply. I know which products work in Scottish waters and which don't.