clear resin for casting?

I use a polytek, polyoptic 1411. It has its own ideosyncracies, as long cure times to full strength, and rigidity. 

 I use a vacuum chamber to pull the air bubbles out before the material kicks, or sets.

I've used Smooth-On products with success.   I've never used their clear resin

http://tb.smodev.com/tb/uploads/Crystal_Clear_200_Series_(202,_204).pdf

Their 202 material casts to 1/16th inch,  so casting aircraft wings may be too fine.

Note too this stuff says that it is not for home use and a NIOSH respirator should be used.

I've also heard that effective clear casting requires the use of a pressure pot -- and that the resin is a slow reacting product  -- i.e. one shot a day.  

Not to rain on your parade -- but you might want to check the Material Safety Data Sheet and product info