kitfox 4 door upper glass, gas stained from fuel tank quick drain.

[Eric Page]

If that's the case, I'm surprised. Lexan is significantly tougher stuff than either Plexi or PETG.

[Monocock]

Politely, I’d disagree.

it’s more brittle, but not stronger.

:-)

[jrevens]

If that's the case, I'm surprised. Lexan is significantly tougher stuff than either Plexi or PETG.

Absolutely... no argument there. Acrylic is the most brittle among those three. Lexan can be cold bent (as is done with the Kitfox Lexan doors), and it has traditionally been used for "bullet-proof" glass, etc. It's just that Acrylic is more scratch resistant of the three and not nearly as vulnerable to damage from fuel as polycarbonate. It's obviously considered strong enough for many aircraft windshields, but I agree that the additional toughness of Lexan is good if you are willing to put up with the relatively softer, less scratch-resistant surface. The PETG sounds like a possible good replacement for the doors, even possibly the formed bubble doors. Lexan is not as easily formed like that.