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.
Simcoe Hull Deck Decontamination Wash
A decontamination wash removes embedded salt, mineral deposits, algae, and oxidation buildup from your boat's hull and deck surfaces. GTHN Boat Polishing provides this essential cleaning service across Ontario, including the Simcoe area, where boats stored near freshwater and seasonal conditions leave mineral and environmental deposits that regular washing alone cannot remove.
Boat owners in Simcoe understand the challenge: your boat looks dull even after a rinse, the deck feels rough underfoot, and the hull shows stubborn marks that won't come clean. These are signs that contamination has bonded to your gelcoat and deck surfaces at a microscopic level. A standard wash with fresh water and mild soap cannot lift these particles. They require a specialized approach to restore clarity, grip, and that protective shine you invested in.
The Problem: Why Regular Washing Isn't Enough
Boats in Simcoe spend seasons exposed to environmental fallout: airborne iron particles from industrial areas, salt spray if you travel to coastal regions, brake dust from nearby roads, tree sap, and algae spores. Over time, these contaminants bond chemically to your gelcoat and non-skid deck surfaces. They do not simply sit on top like dirt; they become part of the surface layer.
When you run your finger across your hull or deck and feel a rough, bumpy texture even after washing, you are feeling contamination. The surface may also look chalky, streaked, or lack the depth of color it once had. This degradation accelerates oxidation and makes future staining worse because the compromised surface texture traps more particles.
The cost of ignoring this buildup is real. Oxidation spreads, protective coatings fail faster, and when you eventually list your boat for sale, buyers notice the dull appearance and poor deck condition immediately. What started as embedded minerals becomes a resale problem.
GTHN's Approach to Simcoe Hull & Deck Decontamination Wash
GTHN Boat Polishing uses a two-stage decontamination method that addresses both iron contamination and organic buildup. Here is how the process works:
- Iron removal wash: A specialized chemical treatment is applied to dissolve iron particles bonded to your hull. You will see the solution change color as it reacts with the embedded iron, pulling it away from the gelcoat surface. This step is critical for boats that have traveled to saltwater regions or sit near highways.
- Organic decontamination: A second treatment targets algae, mold, tree sap, and other biological deposits that thrive in the porous texture of deck surfaces. This breaks down organic material without damaging the non-skid coating.
- Thorough rinse and inspection: After each stage, the hull and deck are rinsed completely, and GTHN technicians inspect the surface to ensure contamination is lifted. Any remaining stubborn spots receive additional attention.
This approach is different from pressure washing, which can damage gelcoat and strip protective coatings if the pressure is not perfectly calibrated. Instead, GTHN relies on chemistry and careful technique to dissolve contaminants rather than force them away.
The team brings this service directly to your boat in Simcoe. Whether your vessel is stored at a local marina, on your dock, or in dry storage, GTHN arrives with all materials and equipment. You do not need to trailer your boat elsewhere or lose access to it during the work.
What You Can Expect as a Result
After a professional decontamination wash from GTHN, your boat's surfaces feel smooth to the touch and look noticeably clearer. The hull regains its original color depth. The deck becomes grippy and safe underfoot again, not slippery from algae or rough from mineral buildup. Many boat owners describe the change as their boat looking "new again" without any aggressive restoration work.
Beyond appearance, the practical benefits include:
- Reduced oxidation risk because contaminants are no longer trapping moisture against the surface
- Better adhesion for protective coatings like ceramic boat coating if you choose to apply them next
- Improved safety on deck surfaces that are no longer degraded or slippery
- Higher resale appeal when buyers see a well-maintained vessel
A boat that has received professional decontamination also responds better to ongoing maintenance. Future washings stay cleaner longer because there is no embedded particle trap to re-contaminate the surface. Think of it as resetting your boat's surfaces to their intended state, then protecting them going forward.
Why Boat Owners in Simcoe Trust GTHN
GTHN Boat Polishing brings a level of expertise to this work that goes beyond basic cleaning. The team understands gelcoat chemistry, the differences between various deck materials, and how environmental conditions in the Golden Horseshoe region affect boat finishes. They use premium decontamination products that are safe for marine environments and marine-grade equipment calibrated for your boat's specific surfaces.
The mobile service model means GTHN works on your schedule and at your boat's location. No early mornings to drive to a detail shop. No worry about your vessel being handled by someone unfamiliar with its layout. You get professional results delivered where your boat sits.
If you own a boat in Simcoe and have noticed your hull and deck losing their finish despite regular care, a professional decontamination wash addresses the root cause. It prepares your surfaces for long-term protection and restores the appearance and safety you expect from your investment. Reach out to GTHN Boat Polishing to discuss your boat's specific needs and schedule a service visit.
Frequently Asked Questions
What is the difference between a regular wash and a decontamination wash?
A regular wash removes loose surface dirt and debris using water and mild soap. A decontamination wash uses specialized chemical treatments to dissolve and remove contamination bonded at the microscopic level to your gelcoat and deck, including iron particles, salt deposits, and algae that regular washing cannot lift. Decontamination is deeper and more thorough.
How often should I have my boat's hull and deck decontaminated?
Most boat owners benefit from professional decontamination once per year, or more frequently if the boat spends time in saltwater regions or sits in areas with heavy industrial fallout. GTHN can assess your boat's condition and recommend a schedule based on where and how often you use it.
Is there a decontamination wash service available in Simcoe?
Yes. GTHN Boat Polishing provides professional hull and deck decontamination wash service throughout Simcoe and surrounding areas including Hamilton, Burlington, Niagara, and the Greater Toronto Area. The service is mobile, so technicians come to your boat at your marina or storage location.
Can decontamination washing damage my boat's gelcoat or deck coating?
No, when performed by trained professionals using appropriate products and techniques. GTHN uses chemistry-based decontamination methods rather than high-pressure washing, which protects your gelcoat and non-skid surfaces while effectively removing embedded contaminants.
Should I have my boat decontaminated before applying a ceramic coating?
Yes, absolutely. Decontamination removes the bonded particles and oxidation that prevent ceramic coatings from adhering properly. GTHN recommends decontamination as the first step in any multi-stage restoration or protection plan to ensure maximum coating performance and longevity.
How long does a hull and deck decontamination wash take?
The timeline depends on your boat's size, the level of contamination present, and how many surfaces need treatment. GTHN provides a time estimate during the initial consultation and works efficiently while maintaining quality standards throughout the process.

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
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