BJMR Twin Lizzie

Tissue is for rubber power models. Silkspan is what you would use which is very hard to come by nowadays. Polyspan would be the better however I wouldn't consider any dope or silkspan, polyspan on a SPORT freeflight plane. It could be ripped and torn on your first flight that is if it makes through the test glide. Iron on covering is the way to go. It's not too heavy and don't let anyone tell you different. You could turn the wing into a pretzel as well if your unfamiliar on how to prevent twists and warps whereas iron allows you to fix it.  Iron on Doculam  is stronger, quicker, lighter and easier to repair over any doped on finish. Use tissue over it or under it for decoration.

                Just for the record, in my video I posted is a .020 Sniffer my buddy Dan built. That is covered with Monokote and he even had to glue the Monokote onto the bottom of the wing. The Sniffer has undercambered wings. That plane flies very well so to those that suggest iron on is too heavy for a .020 model, there you go. Dan's model also isn't a BMJR kit which is much lighter, his is a old Midwest iron wood kit.