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Hangar Flying / Re: fiberglass deterioration
« on: November 10, 2010, 09:05:06 PM »
I'm gonna step out on a limb here...
I live at 7400', lots of sun, little air, lots of UV rays. Fiberglass (epoxy or polyester) has no real shelf life when exposed to the sun/weather. You may notice a bit of 'dusting' of the surface gloss though... Scotch-Brite and elbow grease is one solution.
The foams we use in building are not UV proof. Divinicell (H-45, H-100, ...) and Urethane (that real soft stuff) will degrade. Polystyrene (extruded, blue) will too, but takes a bit longer. Unprotected clear fiberglass will not stop it.
A brown epoxy may very well be Aero-Poxy, which cures with a brownish tinge
If me, I'd try to do a destructive test on a section of a foam/glass layup. Check peel, check to see if the foam has gone to dust. Especially if stored outside with no UV protection (final finish primer and paint)
My $.02, YMMV
Rick
I live at 7400', lots of sun, little air, lots of UV rays. Fiberglass (epoxy or polyester) has no real shelf life when exposed to the sun/weather. You may notice a bit of 'dusting' of the surface gloss though... Scotch-Brite and elbow grease is one solution.
The foams we use in building are not UV proof. Divinicell (H-45, H-100, ...) and Urethane (that real soft stuff) will degrade. Polystyrene (extruded, blue) will too, but takes a bit longer. Unprotected clear fiberglass will not stop it.
A brown epoxy may very well be Aero-Poxy, which cures with a brownish tinge
If me, I'd try to do a destructive test on a section of a foam/glass layup. Check peel, check to see if the foam has gone to dust. Especially if stored outside with no UV protection (final finish primer and paint)
My $.02, YMMV
Rick
But this software is the best, and you can never have too much information 