How to fix bottom scratches, gouges, and chips?

Cannibal

Tasty Human
Location
Summit Lake, WA
Well, finally found a square nose yesterday and went ahead and picked it up. It's in good mechanical shape with 180 psi in the cylinders and some mods. I think I made a good purchase. The one thing that bothers me, is that it was in the Columbia river almost exclusively and the bottom is in rough shape from beaching. So, I want to fix it. The flat down the center of the hull has NO gel left on it at all, as does the ribs and corner edge. It does have some misc chips and gouges that I want to fix at the same time (nothing deep enough to glass). What's the best way to fix this?

I talked to a guy at a marine store and he recommended using a 2 part epoxy-like stuff called Marine-Tex (advertised as: Handles like puddy, dries like steel, sands like wood). A 14oz box was like $33, ouch. Is this stuff the best out there? Or could I get by with some Automotive Bondo? I'd be affraid the hull would flex and the bondo would just break right off. This would be used to fix the chips and gouges.

For the light scratches, he recommended painting on some new gelcoat and using that to smooth out the rest of the hull (to build and sand).

I also mentioned that some people use the appliance paint on the hull with good results and he showed me some marine paint ($33/qt, ouch again) called Brightside. It's actually a topside paint that is very tough (polyurethane paint). It rolls or brushes on and smoothes out to a gloss shine.

What do you think? Any other methods or suggestions?

Also, 2 ride plate holes are stripped, what's the best way to fix this? Do the screws thread into an insert, or just right into the fiberglass? If it's just right into the glass, I'll just epoxy them and drill and tap, or heli-coil.

All input appreciated,
Steve
 

meatball

User Title Unavailable
Location
Maryland
Hull bottoms on SJ's are not gelcoat they are just paint, because the bottom half is made from SMC plastic, not fiberglass. The best way IMO to fill the gauges is using epoxy with micro balloons to make peanut butter. However, it will not look pretty like that. You dont ned to fuss with gelcoat, rather just rattle-can the bottom, you never see it anyways. All the paint stripping off the hull bottom is completely normal. My 91 looks the same way, and I have ridden it pretty hard this season.

Marintex would work, but epoxy filler is stronger IMO

That roll on paint is good, I use epoxycoat and it comes out looking sweet.

The rideplate goes into inserts, not just the glass.
 
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extreemthrottle

freeride junkie
Location
north palm beach
What do you think? Any other methods or suggestions?

Also, 2 ride plate holes are stripped, what's the best way to fix this? Do the screws thread into an insert, or just right into the fiberglass? If it's just right into the glass, I'll just epoxy them and drill and tap, or heli-coil

if you can drill them out and use a time-sert that would be a great way to do it. hopefully you won't have the problem i had. i tried to drill them out and re-tap the inserts. they ended up breaking loose so i had to pull back the hydro turf in the tray, cut a hole in the deck, purchase the new inserts, epoxy the new ones in, and reglass the deck of the tray..
 

Cannibal

Tasty Human
Location
Summit Lake, WA
if you can drill them out and use a time-sert that would be a great way to do it. hopefully you won't have the problem i had. i tried to drill them out and re-tap the inserts. they ended up breaking loose so i had to pull back the hydro turf in the tray, cut a hole in the deck, purchase the new inserts, epoxy the new ones in, and reglass the deck of the tray..

Wow, I hope I don't have an issue like that. Doesn't sound fun.
 

meatball

User Title Unavailable
Location
Maryland
Nah, just get some plain old epoxy and micro ballons, and make it into a kinda peanut butter like stuff. I get all my epoxy from a downtown store that supplies commercial chemicals and stuff, some people buy online from www.uscomposites.com there should be a store near you.

West Systems is the easiest to use, if you've never mixed before, get that with the nozzles that automatically make the ratios right for you, prevents bad batches.

Make it into peantu butter, and slother it on, and use a putty knife to get it smooth, then just let it dry and rattle-can on some paint.
 

Shonuff

I've got the glow
Site Supporter
Location
Memphis
I would sand the hell out of it, lay down a filler primer, and paint over it but I think that would stretch the budget a little.

I love Marine-Tex. It handles like runny puddy at first and then like hot glue, dries like steel, sands like steel. Sanding Marine-Tex is a bitch.
 

ski4

gonzo
Location
cleveland
I would sand the hell out of it, lay down a filler primer, and paint over it but I think that would stretch the budget a little.

I love Marine-Tex. It handles like runny puddy at first and then like hot glue, dries like steel, sands like steel. Sanding Marine-Tex is a bitch.


hell yeah it is, make sure if you use it you get it smooth as you can before it dries,.,
i hate sanding marinetex
 
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