Every hull reaches the point where another coat is one too many: the antifouling is cracking off in plates, or the topside stack has lost adhesion somewhere deep. Removal method is decided by three questions: what is the substrate, how big is the job, and what does the yard allow.
Chemical stripping
Modern marine strippers lift multiple coats per application without methylene chloride, whose severe health risks led to heavy restriction. Chemical removal shines on GRP, where blasting risks the gelcoat, and on jobs where dust is unacceptable. GRP safe grades exist specifically to spare gelcoat; test a patch and respect dwell times. Scrapings come off contained, which marina environmental rules around Dubai increasingly demand.
Abrasive blasting
On steel, blasting with copper slag or garnet is the fast route: removal and surface profile in one pass, straight to ISO 8501-1 Sa 2.5 ready for priming. On GRP, blasting is specialist territory: low pressure, fine media, experienced hands, or the laminate suffers. Sponge and soda methods exist for delicate work but remove slowly.
Sanding and scraping
For one boat and one determined owner, carbide scrapers and vacuum extracted sanders remain honest tools. Antifouling dust is toxic; extraction, suits and masks are not optional. Above a certain hull size the labour hours overtake the cost of either alternative.
The practical answer
Steel hulls: blast. GRP with heavy antifouling: chemical strip. Small local repairs: sand. And when the hull is bare, the clock starts on priming; bare steel flash rusts in Gulf humidity within hours.
MENA Industrial Supplies stocks strippers and abrasives in Dubai with same day quotations. The whole removal to refinish cycle is on our marine page.