Fiberglass hood filler

J

Joe's Notchback

I have fiberglass hood that was bonded together top and bottom. The lip around the edge is not finished. The thickness is 1/8 inch deep and 3/4inch wide. What type of filler do I need to use? I have rage extreme but not sure that will work.
 
Rage will work for any cosmetic repairs but if it's structural where strength is needed you'll want to use glass. Edge work should be done with resin and glass. Low areas, pits divots...these can be taken care of with regular fillers like rage. Make sure to sand and scuff every area before any products are applied
 
Just to give you an idea of what needs to be done on any edge work. Here is a decklid I fixed a few days ago that was damaged during shipping.

Didn't look like much, but the stress cracks went far and fairly deep.
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Ground it all out and made a type of jig
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Mixed up some resin as put some fiberglass in for some added strength.
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Da'd it down with 80. Leveled it out with some duraglass.
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Corners and edges scare me so I always tend to over kill it. Maybe a little over an hours worth of work to fix it. Def faster than shipping it back.

Anyways. Sorry to hijack, but resin will be needed like Bob said
 
Here are pictures of the area i had question about.

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Anybody? I'm a hobbyist working on my own car and have never done a fiberglass hood. I will take my time.
 
I'd be worried about expansion and contraction cracking regular filler in that application. I'd do a layer of resin and mat for strength first then sand and finish it off with regular filler. You should first taper the edge of the inner panel back 1/2" with some 80 grit or a clean-n-strip disc so there's decent surface area for bond strength and also sand/rough up the exposed area of the outer skin. JMO, I get good results with fiberglass repairs but there's some real fiberglass experts that frequent here that may have better ideas.
 
Oj, no the layers are not splitting that is we're the inner and outer shell are bonded together.

Bob, I will try the resin and mat to finish the edge.
 
Am I missing something here?
Looks to me like the part was never finish trimmed after being bonded together.
Are you saying the lower portion is the correct size and the upper part is that undersize?
 
Yes it is finish trim. The hood fits better then a stock hood cause it fills in the gap between the hood and fender.

Yes. The upper part is the bottom side.

The manufacture rep told me just to use filler to finish the edges.
 
I would sand the groove well and apply some resin to seal it in for good! Then use a fill on top to skim coat it and make it smooth. You dont want the hood to flex when you shut it and cause any filler to crack.
 
resin is going to crack . polyester resin is a very weak resin without matt or cloth to hold it together. much like concrete. the 870 is super tuff and is my go to filler on vettes.
 
Sorry, I'ved always put in small pieces of matt when I've use resin. Guess I should have noted that, my bad. That evercoat 870 looks like a good fix! Never knew it existed. Only fiberglass work I ever mess with is hoods and small pieces.
 
did the same for many years then went to epoxy resin. the 870 is a very good filler. not real sure what it is but i know a lot of vette guys who use it instead of regular filler. apply it smooth because it is a bear to sand.
 
I have a simliar repair like this hood I have coming up. I will def try this 870 filler out. Thanks.
 
Thanks shine!

I saw a thread a while back that used the 870 on a vette for minor repairs and was wondering if that would work too!
 
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