ORIGINAL: cmoulder
A couple of times in the past I have used the clear silicone stuff from GE. Just laid a big bead in the wing saddle and reinstalled the wing with the wing saddle aread of the wing covered in Saran Wrap.
Many years ago I tried saran wrap and wasn't pleased with the result. It was perfectly functional but on my plane is was ugly, cratered, full of creases.
I eventually tried one of my kids' crayons on the wing....rubbed it on the wing. It released well. Removing the crayon wasn't a big deal with a little mineral spirits. I still use this technique on cowls and canopies occasionally.
What I do now is different yet. I apply a strip of sticky back teflon tape onto the wing. The release is perfect every time....Good luck