Fiberglass work? (Fiberglass tub modification...)

[Haggar]

OK, looking at some basic mods to my fiberglass tub.. Understand the basic process of resins and matting/fibers. But, is there anything I need to do to get it to bond nicely to the existing tub?

Just sand the regular tub down a bit where they will meet?


My planned mods:

Cut out the front 6 inches of the rear wheeltubs to allow the seats to go backwards for more leg room. Just want to cut out a chunk and glass in a new section 6" back.

Repair a few holes (2" to 6") cut into the floor.

Also maybe make a new transmission tunnel.

Any tips?

[MuddyPaws 3.0]

I have always scored a X pattern in the ajoining parts to make sure it bonds. Not sure if you have to, but I do it with good results.

[Haggar]

I have always scored a X pattern in the ajoining parts to make sure it bonds. Not sure if you have to, but I do it with good results.

Sounds reasonable. Thats what I was thinking, grinding/scoring in some various stuff to get some 'tooth' to it...

[MuddyPaws 3.0]

Yea....you got what I meant. I wasn't sure if I explained it right....but you are smart.

[pre4runner]

for holes and repairs its good to grind down a couple inches around the area so you get a nice overlap instead of a butt joint.

[mdswmich]

for holes and repairs its good to grind down a couple inches around the area so you get a nice overlap instead of a butt joint.

I did this when working on a vette body, it gives you a little more room to work too. Scoring would probably work, but I don't think it will make much of a difference if you do or dont.

[Haggar]

for holes and repairs its good to grind down a couple inches around the area so you get a nice overlap instead of a butt joint.

Also a good idea. Like when repairing wet plaster walls, I chip out a big area around the repair so its flat instead of feathering out over the repair mesh.

[MuddyPaws 3.0]

The overlap is kind of a given with any body work. i don't think anything would work with a just a butt joint...and what would you score if you were doing a butt joint?

[Haggar]

The overlap is kind of a given with any body work. i don't think anything would work with a just a butt joint...and what would you score if you were doing a butt joint?

Yeah, but what he's saying is to grind it down so its more of a half-lap joint. It overlaps, but doesn't stick up above the other material.

[pre4runner]

Yeah, but what he's saying is to grind it down so its more of a half-lap joint. It overlaps, but doesn't stick up above the other material.

thats what i was getting at, thanks