How to restore a faded gelcoat

How to strip paint and antifouling from your gelcoat

The gelcoat on a boat is an outermost layer on the hull of a vessel. Through epoxy, a polyester resin, a catalyst and other chemicals, it provides water-resistant properties. Gelcoat combined with fibreglass produces a strong and smooth surface, preventing the hull of the boat weakening.

Over time the gelcoat on your boat may start to look old, worn and faded. This is due to oxidation. The marine environment has slowly eaten away at the gelcoat, creating small chips and scratches and the UV exposure has faded it. This inevitably leads to the gelcoat losing its shine.

How to restore Gelcoat shine

There are circumstances where you can restore the gelcoat to its former glory by using a product such as Gelcoat Restorer. It works by penetrating deep into the gelcoat, restoring the lost shine and pigment, and providing a tough, durable finish. The finish, previously dulled and chalky thanks to the marine elements will be rejuvenated. This will make it look great and give you great satisfaction as a boat owner.

Sometimes, you may not be as lucky and may need to strip the gelcoat back to the bare hull. This could be due to the layers of paint accumulating over a few years. There will be indicators that it is time to take this course of action. Things such as; water being trapped under the paint, therefore, causing blisters, patches of paint flaking away and creating a sort of cratered effect.

If it is in a bad way, it is indeed time to start from scratch. This requires removal of the paint. While you can hire a professional to complete this, the most cost-effective option is for people to do this job themselves.

Gelcoat Restorer in use on a boat

How to strip the Gelcoat

Scraping is an option but is a choice that will require a lot of time and a lot of work. An alternative that will cause a lot less hassle is to use a chemical stripper. Now, you can’t just use an ordinary paint stripper for the task. The product has to be suitable and safe for use on glass reinforced plastic surfaces (GRP), commonly known as fibreglass.

Marine Strip is a readily available product that can be used to aid the paint removal process. After applying the stripper, it gets to work after a few hours, softening the top layers of the paint work. Within 12 hours, the paint will be simple to remove through the use of a pressure washer and scraper or brush.

It is a lot less labour intensive to use a chemical stripper than it is to scrape off the paintwork, with no chemical assistance. It could also lead to unintentional scratches and damage to the underlying gel coat.

With the use of a product like Marine Strip, it takes some of the work required away as it can be applied and left overnight to work its magic, removed the next day. It is also a cheaper alternative than paying somebody else to complete the work for you.

The marine environment will cause your gelcoat to look tired and in need of a bit of a revival. Rest assured, there are options available to give it that new lease of life which will restore your enthusiasm in the process.

We hope you found this post on how to strip paint and antifouling from your gelcoat helpful! If you have any other advice or top tips, please feel free to leave them in the comments below. We love hearing from you!

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Owatrol Team
About Owatrol Team

Our team are ready and willing to support you with your requirements whether it is protecting your newly laid deck or renovating a luxury yacht, whatever the application Owatrol has the solution you are looking for.

8 thoughts on “How to strip paint and antifouling from your gelcoat

  1. Dear sir,
    is owatrol marine gelcoat restorer available for sale in Malta ?
    if yes, can you give me the name and address of the agent in Malta ?

    1. Hi Alfred,

      Thank you for your query.

      I can confirm that we have a supplier in Malta and their details are as follows:

      SUNDECKS Ltd
      65 Battery St.
      VLT-1223, Valletta

      Tél. : +356 79 970 970
      Email :

      I hope this answer was helpful.

      All the best,
      The Owatrol Team

  2. so owatrol marine strip will remove paint and wont damage gel coat or strip it off boat wait for your replay thanks

    1. Hi there J,

      Marine Strip is a powerful water-soluble paint and anti-fouling stripper designed for the removal of up to 8 coats in just one application. It is perfect for use on boat gelcoats as it’s gel consistency means no drips, even on vertical surfaces. It is safe to use on virtually any surfaces including wood, plastic, metal and GRP.

      Marine Strip is not effective on 2 component, baked-on paints or polyurethane paint and varnish.

      Please see the product page for further information: or do feel free to give us a call on : 01582 592707 or send us an email to: if you have any further questions.

      All the best,
      The Owatrol Team

  3. Hi, I want to use Owatrol Marine Strip on my plastic boat to remove the old paint on its deck.
    Is it alright to paint it on one day and leave it on overnight say 24 hours before rinsing off again or would I be best advised to try remove it again when 12 hours?
    Thanks in advance.

    1. Hi there Mark,

      Please do correct me if I am wrong, but it seems as though you may be getting confused between removing antifouling from the gelcoat instead of removing paint from the wooden deck?

      Marine Strip should only be left on wood for a maximum of 45 minutes (generally 20 minutes is enough) before rinsing and applying Net-trol. If you were to leave Marine Strip on wood for 24 hours, it will be a disaster.

      The 12 hours working time is in reference to application onto antifouling.

      If you have further questions, please feel free to call us directly on: 01582 592707 or email us at: where our technical team will be able to assist you further.

      All the best,
      The Owatrol Team

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