Hull scratching can occur when your fishing kayak travels over sharp surfaces, such as concrete ramps, oyster bars, and sharp rocks. Scratches are usually not a problem, and do not need much attention.
Nevertheless, if you want to avoid scratches on your fishing kayak, watch out for hazards in the water, especially when fishing or paddling in shallow water.
Kayak fishing and paddling from a higher spot than normal kayaks offers you an advantage in noticing possible hazards before scraping against them. Kayaks such as the W fishing kayak offer this advantage, as W anglers will affirm. This higher spot is also helpful in detecting fish.
When repairing scratches in plastic kayaks, the method is similar, even with different depths and lengths of the scratch. For cosmetic scratches, no repairs are recommended, but if you want to do something, you can just heat the scratch using a propane blow torch.
Apply the flame over the scratch slowly and tentatively until it disappears or diminishes considerably, while not overheating the space, to not cause a deformity.
Direct the fire in an acute angle, and not directly in the front. This will decrease the chances of accidental overheating.
(Caution: Heating plastic will change its color)
For deep cuts, warm the end of a metal spoon, and administer the tip moderately along the cut, welding it shut.
As well as in shallow cuts, be careful not to overheat, and deform the plastic
Cuts in a polyethylene kayaks, which do not occur often, must be fixed correctly: Welding will not fix a broken hull, but welding a patch to the interior of the kayak on the cracked area, will resolve the problem. This is because if welded, the hull in the broken area will be much weaker than other areas, and may reopen while kayak fishing or paddling.
Cracks above the waterline can be patched with rivets, which is not recommended for lower breaches.
Protecting the hand that is wielding your device is very important, as metal conducts heat.
Beware and remove any possible flammable materials, and do not direct the fire at others, as well as keeping children and pets far away.
(If you lack in experience in using blow torches and hot objects, it is not advised that you undertake in these projects)