Hey I don't mean to sound indifferent, But I use expoy and thin with rubbing alcohol , I found this to work well as alcohol cuts expoy. Used this method to build radio airplanes years ago. WE used this method to water and fuel proof the firewalls . I know this doesn't have anything to do with bows, but borrowed ideas from the past come in handy sometimes. It thins the viscosity of the expoy and you get good penetration. Good Luck Denny