As time goes by and your boat gets its fair share of use, the gelcoat might lose its shine, giving your boat an aged appearance. Reviving your gelcoat can bring back that shine and safeguard the surface of your boat. Begin by ensuring you've removed any surface dirt and stains. If your gelcoat appears extremely dull, devoid of any bright or glossy spots, you'll want to start by applying polish. Once you've applied the polish, or if your boat isn't overly dull, you can proceed to waxing.
Procedures
Cleansing Your Vessel

Scrub your boat's exterior with boat soap and lukewarm water. Boat soap is formulated to minimize residue and is more eco-friendly than dish soap, making it the ideal choice for cleaning your boat. Mix 2 parts warm water with 1 part boat soap in a large bucket. Dip a mop into the soapy solution and use it to mop the surfaces of your boat. You should notice dirt lifting off as you mop.
- You can purchase boat soap at most hardware and marine supply stores.
- For cleaning the deck of the boat where the plastic is molded and difficult to clean, you can utilize non-skid cleaners.

Inspect for any damage or fractures. After cleaning your boat, stroll along its length, keeping an eye out for any cracks. Running your hand over the boat's surface as you walk might help you detect a crack before you see it.
- If you discover small, hairline cracks, you can fix them yourself using epoxy. Fiberglass epoxy is commonly found at most boat supply stores. Adhere to the epoxy's instructions for repairing the cracks.
- For deeper or larger cracks, it's best to seek professional assistance for restoring your boat.

Utilize acid-based stain removers to eliminate mineral and organic stains. Opt for a gel acid-based stain remover for stubborn stains. Wear rubber gloves and eye protection before applying the remover. Apply the cleaner to the stain using a rag and allow it to sit for 20 minutes. Rinse off the remover using a hose.
- Depending on the severity of the stain, you may need to apply multiple coats.
- If a particular type of stain proves resistant to the remover, consider using a specialized remover. You might require one for removing mold, black streaks, or rust.

Securely tape off any vulnerable fittings. Your boat likely features numerous fixtures that cannot be removed, such as metal fittings and railings. Use painters' tape to protect these areas. This will prevent them from sustaining scratches during the gelcoat restoration process.
Using Polish to Rejuvenate Shine

Apply a small quantity of polish onto a soft cloth. Most boat supply stores stock gelcoat polish. The polish label should provide precise usage instructions. However, avoid using excessive amounts, as you'll be working on small sections, typically no larger than 1 ft (0.30 m) square.

Massage the polish into the gelcoat. Hold the cloth containing the polish in your dominant hand. Then, using small circular motions, massage the polish into the gelcoat. Continue massaging until the surface achieves a glossy shine.

Progress horizontally along the hull. Upon completing the polishing of each section, move to the adjacent section of equal size. Repeat the process of applying polish along the entire hull. Then descend just below the last section and commence moving in the opposite direction.
Utilizing Wax for Gelcoat Restoration

Wear protective equipment. Wax contains potent chemicals with a strong odor, and contact with the eyes can cause severe harm. Prior to applying wax, ensure you wear safety goggles and gloves.

Dispense some wax onto a soft cloth or foam pad. The amount of wax required depends on the type of wax being used. Refer to the container to determine the appropriate amount to apply onto your cloth or foam pad.
- The ideal wax for restoring gelcoat is marine wax, formulated specifically for boat use and waterproof properties. Alternatively, hard shell car wax can also be used.
- If applying wax manually, use a cloth.
- If using a buffer, employ a foam pad.

Apply wax manually using a cloth. Hold the cloth in your palm. Start at one end of the boat's hull, pressing the cloth against it and rubbing in the wax using circular motions. Stick to either clockwise or counterclockwise direction to avoid wiping off the wax.

Utilize a buffer for larger tasks. For big boats or if you prefer not to apply wax manually, a buffer can be used. Attach the foam pad to the buffer, then place it flat against the hull and turn it on. While the pad moves in circles automatically, move the entire buffer in large, slow circles along the boat.
- Reload the pad with wax every few feet.

Allow the wax to dry. Once the wax is mostly dry, it will create a hazy finish. When you notice this haze, use a soft old bath towel to buff away the excess wax. The remaining wax will fill the gelcoat's pits and restore its shine.

Work on the boat in sections. Finish one area, then move to the adjacent section immediately. Continue horizontally along the hull. After reaching the end, move below the last waxed section and start working in the opposite direction down the hull.

Apply another layer of wax if needed. If your boat still lacks shine, apply another layer of wax, especially if it's been a while since the last gelcoat restoration. Apply this layer manually to avoid removing the first layer with a buffer.