Peter developed a cool way to waterproof your foam board airplane. You might have seen the results of this technique in our Planes: Fire Rescue episode.
The coating will vary in smoothness based on how many coats you apply and how much sanding you do.
You'll need Water Based Minwax Polycrylic, Brown Kraft paper, and Baby powder.
The key ingredient to this trick is Water Based Minwax Polycrylic.
Cut the paper to size and coat it with the Water Based Minwax Polycrylic before applying to your airplane.
Also, brush on the Polycrylic to the fuselage of your foam board airplane.
The each coat dry and sand with 220 grit sandpaper.
Peter recommends that you only use this technique on the fuselage of your airplane, not on the wings.
Adding some baby powder with a 1 to 1 ratio to your Polycrylic will give you a nice sand'able coating.
Be sure to share your tips in the comments and join in on the discussion in the forum HERE!