Originally Posted by acesimmer
............. I'm intending to bag the wings and was just hoping for a less expensive alternative than Carbon. ...........
This is at variance with your opening post!
Are you going to vacuum bag or not vacuum bag?
As for less expensive, full carbon skins are not absolutely necessary to achieve the strength you probably require, especially given you can afford to sacrifice some strength weight ratio in a powered plane. Carbon spar caps are almost mandatory in my estimation. The cost/strength ratio of carbon tow spar caps will blow any other material away. It's inexpensive compared to carbon cloths etc.
Please note my spelling correction in my previous post.