What to use to repair a Comet GT scoop

I have a Comet GT hood scoop that needs some repair ... a crack and a 2 inch bite taken out of one side.

I would like to hear from anyone that has repaired one ... what did you use? ... and did it last?

 

Since its not really " fibreglass" you need to be careful what you use, as it will expand and contract at different rates according to the temperature. When we repaired my rear spoiler centre section, it looked awesome, but depending on when and where, the repair can be seen from time to time. I think we used panel bond adhesive..but it's been awhile.

 

Whaty what? Mine is bare and looks fiberglass. Please explain.

 

Send maverickman a message, I sent him one to make a mold... He is going to make carbon fiber gt scoops when he gets time to work on it... I hope he gets to it because it will go nice with his carbon flat hood...

 

Mine is stripped and it sure appears to be fiberglass. I even double checked it this morning.

It needs some repairs so I'm interested in the answer here.

 

I also just searched repairing Grabber spoilers as they appear to be similar in material. Neither seems to be regular fiberglass, but some hybrid.

Most of what I read there suggested strand-type fiberglass, instead of woven sheets, unless there is room inside.

Very interested to see what works. My scoop is damaged, but worth saving.

Also interested in opinions as far as repairing it while mounted on the hood vs. loose. Wondering if bolting it down stresses it and if that would affect the repair.

 

My dad gave me a good tip about the one he installed on his car back in the 70s. He unscrewed the attaching studs and taped sheets of sandpaper to the hood. Then gently moved the scoop back and forth which sanded to scoop to fit the hood perfectly.

I was under the impression the Grabber rear spoilers were vacuum formed fiberglass much like 68 + Shelby parts as opposed to hand layed fiberglass.

I can see fiberglass strands in my Comet GT hood scoop but judging but the part numbers molded in I figured it was vacuum formed as well.

 

I like that idea about using sandpaper on the hood to shape the scoop. That will be useful to help repair the one edge that needs it on mine.

 

They are made of SMC,sheet moulded compound. It looks like fiberglass,but it's not.I would use a panel bond adhesive or something specific for SMC.Fiberglass doesn't stick to it very well and when it is out in the sun it could blister and delaminate.Also I would use a backing tape similar to the mesh used under drywall.(really)

 

Very cool info ...thanks for chiming in.

Can panel bond adhesive be formed and worked like fiberglass resin?

I can visualize fixing the cracked area on the scoop. The missing chunk on one side has me a bit baffled as to how to approach it.

 

Finding links on this SMC

Doing searches on this stuff ...

Interesting links that other folks here may find useful if they need to repair a Comet GT scoop. I take it that Grabber spoiler center sections are made the same way.

http://www.pwctoday.com/showthread.php?t=80856

3M stuff made specifically for SMC repair ...

http://3mcollision.com/products/plastic-repair/fiberglass-repair/3m-400ml-rigid-parts-repair-08275.html

Good repair info here ....
http://www.tech-cor.com/AutoResBulletin/1990-1/1990-1.htm

This one covers a lot of other materials too, so you have to focus on the SMC stuff....

http://www.fibreglast.com/product/fiberglass-repair-composite-repair

 

Get some fiberglass mat and chop it up, then mix it with the panel bond. That should add some strength to it.

 

The one I purchased is fiberglass , someone already started fixing it .They never finished. So I am going to.

 

I've seen aftermarket repops of the scoop that are fiberglass, but the factory originals are a little different.

I have just read a ton of stuff about it, and it looks like the early 70s was when these materials just started coming into vogue. For example, Corvette body panels switched in the years 70 -74, with more of the body being made in SMC.

It seems that you can use materials for SMC repair on both fiberglass and SMC, but regular materials for fiberglass will be likely to fail on an SMC piece. There is a mold release agent that is mixed throughout SMC and that is the biggest difference. With fiberglass, you can sand through an outer layer and achieve a bond.

 

Use "Kitty Hair" from fiberglass evercoat company... its chopped up fiberglass strands in polyester filler. Its used for filler when you want a little strength and flexibility.

That SMC stuff... did it exist in the 70s?
The scooops are probably chopper gun fiberglassed..
A picture of the damage would help. I do fiberglass repair professionally at times, on boats