My suggestion is that you first do some serious research on a particular plane type. Then see if you can find a unique paint scheme that hasn't been done. Post your suggestion with the profiles and images you've found and maybe someone will bite.
You;ll find a lot of us who have our own resources that we are more then willing to share with the skinners, and I'd like to think we are fairly decent at quality control if given the opportunity before a skin is submitted to HTC,
Take advantage of the people here willing to help and be open to their suggestions and criticisms. We all benefit from the quality work the good skin makers do and anything we can do to support that without just throwing things at them hoping they stick, can only be a good thing.