After several years of applications there may be a build-up of antifouling protection on the hull. Aesthetic considerations aside, this means a drop-off in performance, and new antifouling protection can tend to peel as it will not have a solid surface to bond to.
Therefore, this build-up has to be removed to return the surface to its original condition. We recommend using mechanical means to remove the build-up on fiberglass boats such as scraping and sanding which, because although it does require a little more time than sand-blasting, it won’t damage the gel-coat.
A full paint cycle can be applied after having sanded the whole hull back to the gel-coat. We recommend planning this type of work for the autumn, from September to December, also to take advantage of the best prices at this time of year.