Our Process

Restoring the SHINE of your boat
Step 1: Initial Wash
A decontamination wash is essential to start correcting the gelcoat by scrubbing/washing the boat to remove old waxes and dirt to prepare the surface for restoration.
Step 2: Oxidation Removal
If the boat has heavy oxidation, it will be wet sanded as needed, particularly if it leaves a chalky residue at first touch. This will be followed by compounding to reveal the glossy gelcoat underneath.
Step 3: Polishing
Polishing will eliminate any scratches or swirls left from compounding and provide a protective layer.
Step 4: Protection
Once compounded and polished, GTHN will apply a coat of wax, polymer sealant or ceramic coating to protect the finish.
Step 5: Maintenance
Routine maintenance is essential for preserving the gelcoat. Regularly washing the boat and reapplying protective sealants will help keep it looking its best.
St Catherines Mobile Hull Deck Decontamination Wash
Decontamination washing removes salt spray, oxidation, mineral deposits, and embedded contaminants from boat hulls and decks-the foundation step before any restoration or protective coating work. GTHN Boat Polishing delivers this service to boat owners in St. Catherines and throughout the Niagara region, bringing professional-grade equipment and methods directly to your marina or storage location.
St. Catherines has emerged as a significant boating hub within the Golden Horseshoe, with easy access to Lake Ontario and the Welland Canal corridor. Boat owners here face particular challenges: saltwater exposure, seasonal weather cycles, and the rapid oxidation that comes with waterfront storage. GTHN understands the specific demands of maintaining vessels in this region and has built its mobile service model around the reality that St. Catherines boat owners value their time and expect professional results without the hassle of trailering.
Why St. Catherines Boat Owners Need Professional Decontamination
Hard water deposits, salt residue, and industrial fallout bond to gelcoat surfaces and create layers that ordinary washing cannot remove. These contaminants accelerate oxidation and dull the finish long before UV damage becomes visible. A thorough decontamination wash breaks down these bonded layers and restores the surface to a clean state-which is essential before applying ceramic coatings or beginning multi-stage correction work.
GTHN Boat Polishing uses multi-stage decontamination protocols that address different types of buildup. The process includes clay bar treatment, pH-balanced wash systems, and inspection to identify areas that may need further attention. Because contaminants are removed rather than just rinsed away, the results are measurable and lasting.
Boat owners in St. Catherines who handle washing themselves often find that standard soap and water leave a film or haze-a sign that decontaminants remain. professional decontamination wash eliminates that problem entirely, leaving bare, clean gelcoat ready for protection or restoration.
Mobile Service vs. In-Yard Facility Washing
| Criteria | Mobile Decontamination Wash | Fixed Facility Washing |
|---|---|---|
| Travel and trailering cost | Eliminated | Your responsibility |
| Downtime away from your marina | None | Full day or more |
| Scheduling flexibility | Booked at your location | Facility hours dictate availability |
| Water quality control | Professional filtration and pH management | Varies by facility |
| Convenience for seasonal prep | Dock-side service, fits your timeline | Travel required before/after season |
GTHN Boat Polishing operates as a mobile service specifically because boat owners in St. Catherines and the surrounding Niagara area deserve the option to stay at their marina while professionals handle the work. There is no advantage to moving your boat off the water for a washing service-and several disadvantages. Mobile decontamination wash brings professional equipment and expertise to you, preserving your dock time and eliminating logistics.
What Happens After Decontamination
Decontamination washing is not the end result; it is the preparation. Once the hull and deck are clean and free of bonded contaminants, GTHN can assess the condition of the gelcoat and recommend the next steps. Some boats benefit immediately from ceramic coating application, which locks in the clean surface and provides UV protection. Others need gelcoat restoration or multi-stage correction to address oxidation or minor scratches before protection is applied.
St. Catherines boat owners often discover, after professional decontamination, that their gelcoat has more shine and depth than they realized-because the boat had never truly been clean before. This clarity makes it easier to decide whether additional restoration work is worthwhile or whether a protective ceramic coating is the best investment at that point.
Making the Right Choice for Your Boat
A single decontamination wash is appropriate for maintenance-vessels that are regularly cared for and do not show oxidation or dull patches. However, if your boat displays haze, discoloration, or a chalky appearance, decontamination combined with multi-stage correction will restore clarity. GTHN Boat Polishing evaluates each boat individually, so you know exactly what your vessel needs before work begins.
Boat owners in St. Catherines who want to protect their investment and maintain resale value should treat decontamination as a seasonal service-before applying ceramic coatings in spring, or as part of fall winterization prep. The cost of professional decontamination is modest compared to the price of allowing oxidation and salt damage to accumulate over seasons.
If your boat is stored or moored in St. Catherines or anywhere in the Niagara region, contact GTHN Boat Polishing to schedule a mobile decontamination wash. We will assess your boat's condition, explain the process, and deliver results that prepare your vessel for whatever comes next.
Frequently Asked Questions
How often should I have my boat decontaminated in St. Catherines?
Boats exposed to saltwater or hard water deposits benefit from professional decontamination washing at least twice per year-before and after peak boating season. St. Catherines boats experience heavy salt spray from Lake Ontario and the Welland Canal, making regular decontamination especially important to prevent rapid oxidation and gelcoat degradation.
What is the difference between regular washing and decontamination wash?
Regular washing removes loose dirt and debris, but decontamination washing uses specialized techniques and chemistry to remove bonded contaminants like salt, mineral deposits, and industrial fallout that ordinary soap cannot lift. These embedded contaminants accelerate oxidation and dull the finish, so decontamination restores the surface to bare, clean gelcoat.
Can I wash my boat myself instead of hiring a professional service?
You can rinse your boat, but professional decontamination requires specialized equipment, pH-balanced chemistry, and clay bar treatment to remove bonded contaminants effectively. Most boat owners find that DIY washing leaves a haze or film, which indicates decontaminants remain. Professional service ensures complete removal and prepares the surface properly for coatings or restoration.
Will decontamination wash restore my boat's shine?
Decontamination wash restores the natural clarity and depth of clean gelcoat, but it does not repair oxidation or scratches. If your boat has a dull or chalky appearance, multi-stage correction work is needed after decontamination to fully restore shine and protection.
Is mobile hull and deck decontamination wash available near me in St. Catherines?
Yes, GTHN Boat Polishing provides mobile decontamination wash service throughout St. Catherines, Niagara, Hamilton, Burlington, and the Greater Toronto Area. We come to your marina, dock, or storage location-no need to move your boat.
What should I do after my boat is decontaminated?
After decontamination, GTHN will assess your boat's condition and recommend ceramic coating application for protection, multi-stage correction if oxidation is present, or SeaDek flooring installation if deck renewal is needed. Many owners choose ceramic coating immediately following decontamination to lock in the clean surface.

Customer Testimonials

Kevin D, Caledon
I couldn’t be happier with how the ceramic coating turned out on my boat! I was blown away and the boat looks awesome! The shine is incredible and I know it will last. GTHN did an amazing job! Highly recommended!

Jan P, Hamilton
I had GTHN polish my boat. He did a fantastic job! Upfront and honest, and worked very hard. I highly recommend them!

Chris B, Hamilton
It’s hard to find reliable people in this industry, but Neil was one of them. Price was fair, work was awesome, communication throughout was above and beyond. I will use GTHN again and would highly recommend if you found them, you do the same.

Phong T, Kitchener
This was the first time I worked with Neil and the experience was great. He came out to do a couple of test spots before we settled into a quote and the rest of the scheduling was just as easy. The end result was fantastic.
Definitely recommended!!! 🙂

Diego M, Toronto
I’m amazed with the work that was done. I highly recommend it 100%
Fast and best ever results. Thanks Neil for your time and effort.

Steve B, Hamilton
We are beyond happy with the work done on polishing the hull of our boat. Not only is the work amazing, but Neil went out of his way to get our boat ready on time for launching. Small touches like putting painters tape on the line separating the gel coat and bottom paint are appreciated. As is the extra time spent on trouble spots. Highly recommend GTHN Boat Polishing!
We Will Come To You!
Feel free to contact us with any questions regarding your boat! We would love to help!
GTHN Boat Polishing
info@gthnboatpolishing.ca – 289-698-5909
CALL – TEXT – EMAIL

