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Why Fiberglass & Gel Coat Damage Matters
Fiberglass and gelcoat damage including cracks and gouges allows for water penetration causing structural damage like delamination affecting the integrity of your hull.
UV exposure dulls the colors of your investment by breaking down the polymers thus leading to thermal checking.
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Water Intrusion undermines structural integrity
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Osmosis Blisters form under gel coat, causing bubbles
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UV Fade accelerates degradation of inner laminates
Our Fiberglass & Gel Coat Repair Services
We tackle every level of damage with precision:
Minor Blemish Removal
Sand and buff light scratches until smooth.
Crack & Hole Patching
Rebuild with OEM-grade fiberglass layers.
Osmosis Blister Treatment
Sand and buff light scratches until smooth.
Full Surface Refinishing
Sand and buff light scratches until smooth.
UV-Resistant Topcoat
Sand and buff light scratches until smooth.
The Repair Process
Our five-step workflow delivers reliable, repeatable outcomes:
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Inspect & Quote
Document every flaw. Provide a detailed estimate. -
Surface Prep
Strip old coatings. Clean and sand to bare fiberglass. -
Fiberglass Lamination
Rebuild fiberglass layers (when needed) to rebuild strength. -
Gel Coat Application
Spray custom-matched gel coat. -
Final Sand & Polish
Buff to a showroom-level gloss.
Why Rapid City Chooses Kustomz
We do more than fix cars. We customize, restore, and build one-of-a-kind projects for Rapid City’s most passionate drivers and boaters.
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Local + Family-Owned
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Cars, Trucks, Bikes and Boats Welcome
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Custom Builds and Conversions
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PPP Certified Technicians
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Lifetime Warranty on Paint and Body Work
Real Reviews from Rapid City Customers
Steve and his crew at Kustomz did an awesome job for me! Fast and professional care from start to finish and I couldn't be more pleased with the work performed on my vehicle! I would highly recommend them to anyone looking for a business who cares about your car/truck or boat as much as you do! Thanks again, guys!
Mattew R., Rapid City
I have used this business many many times and they always go the extra mile to make sure their customers are satisfied. I have recommended this establishment to over 80 friends and family and will continue to do so.
... Steve and all of his employees went above and beyond to help get my pick up, repaired and back on the road as soon as they could. The process was really easy as far as getting everything submitted to insurance and payment. The quality of work was also exceptional!
Your Questions Answered
Q: How long will repairs take?
A: Most jobs finish in 3–5 days, depending on damage.
Q: Do you match custom gel coat colors?
A: Yes. We blend pigments on-site for exact OEM matches.
Q: Is there a warranty?
A: We back work with a lifetime workmanship warranty.
Restore It. Customize It.
That's Kustomz with a K. Your custom shop with the custom name.
From minor dings to full-hull rebuilds, our marine-certified team restores your vessel’s strength and shine. We handle fiberglass patching, gel-coat refinishing, osmosis blister treatment and structural reinforcement. Ready for smooth sailing?
Call us at (605) 787-4179 for a free hull inspection, or stop by our Rapid City boat repair shop and let’s get you back on the water with confidence!
Check Out Our Finished Projects
