Fibreglass issues
Thread Starter
Instructor
Joined: May 2006
Posts: 118
Likes: 0
From: Sydney NSW
Fibreglass issues
Has anyone had any issues with fibreglass bubbling on the hood. I have had my third re spray and again in the same areas I have pimples (which expand over time to bubbles) forming particularly around the air cleaner and directly above the extractors. The hood gets hot but I am not aware 80 vets had insulation? I have been told that preparing the surface with wet and dry rub causes the fibreglass to absorb the wet which then releases under heat and under the new finish. This hood was rubbed wet and dry.
Melting Slicks
Joined: Jun 2009
Posts: 2,709
Likes: 3
From: Savannah GA
It seems likely that your hood is soaked with oil or antifreeze either from an engine leak or from an A/C compressor failure. Is the underside of the hood oily/greasy to the touch?Wet sanding is an accepted practice in fiberglass body repair as long as the panels are allowed to dry 24-48 hours before topcoats are applied. "Dry Rubs" are tasty pre-barbecue spice mixtures which can enhance the flavors of meats but won't do much for the flavor of fiberglass. If you have oil or glycol soaked parts there are two ways to approach a repair... strip all the paint off the hood and heat the part (lying on blacktop in direct sun works well) then wash the surface with either a detergent (My preference) or wipe it with a solvent like acetone or lacquer thinner... repeat as required until no more contaminants surface; OR replace the hood and be done with it.
Thread Starter
Instructor
Joined: May 2006
Posts: 118
Likes: 0
From: Sydney NSW
Thanks for the answers, the underside of the hood looks normal and consistent and nothing is visibly wrong, I suspect not allowing dry time after wet and dry could be the issue. It is interesting that the bubble pattern is always in the same places and where the heat would be worst, but I would imagine that a hot hood is common on early vets and bubbling is not. As for the L88, this is an Ozzi car and so far I have baulked at import cost and possible damage.
Intermediate
Joined: Nov 2009
Posts: 47
Likes: 1
From: townsville q.l.d.
Thanks for the answers, the underside of the hood looks normal and consistent and nothing is visibly wrong, I suspect not allowing dry time after wet and dry could be the issue. It is interesting that the bubble pattern is always in the same places and where the heat would be worst, but I would imagine that a hot hood is common on early vets and bubbling is not. As for the L88, this is an Ozzi car and so far I have baulked at import cost and possible damage.
I'm hearing that, customs,tax,duties, I recently broke a rear screen on my 78 (Stupid mower) Cost Just over $2000
Thread Starter
Instructor
Joined: May 2006
Posts: 118
Likes: 0
From: Sydney NSW
I actually bought a high rise aftermarket hood off Aust Ebay and it didn't fit, close but not enough side margin. It might just have been for an earlier model but this also worries me with a new hood. Also notice your photos, just imported 2 new rear spindles to re do the bearings and one spindle broke going up a hill. Wheelies and doughnuts are off my menu!
Thread Starter
Instructor
Joined: May 2006
Posts: 118
Likes: 0
From: Sydney NSW
Thanks for the info particularly the thinner gas off any idea what time frame we are talking about? A day or so in the sun for instance, is there any way of checking moisture and such are gone?
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Le Mans Master
Joined: Aug 2010
Posts: 9,272
Likes: 17
they make guages for the testing, but depending on temp. and the products you are using , if specs call for 1/2 hour between sprays, give it a good 2-3 hours then adjust your technique to allow for the added time. a day in the sun would cook off anything, if I were having an issue, thats what I would do.