Joe,

Since the only balsa on this airplane is the fuselage, spraying it can be a good approach.

As for covering, with parkflyers one preferred covering is Solite. It's also marketed here in the US as Nelson's Light Film and I believe Coverite is also going to start packaging it, I forget what the name will be. This stuff can be hard to find, but don't let that keep you. There are others that will be suitable.

Stick with the lighter types mostly because the heavier ones may shrink too aggressively and might distort the structure some - although distorting a box fuselage would take a lot. Browse what's available at the local hobby shop.

At the end of the day, go with what you feel most comfortable with. Either way you'll have a great flying airplane.

My first cover job on my original Dandy was done with 21st Century Fabric .... you can't get any heavier than that! It looked and felt like something I could work with on my first build. I ended up with a model a good 3 ounces heavier than what most people were reporting and it flies great! It wants a bit more speed because of the extra weight, but that hasn't hurt my getting a lot of enjoyment out of it.

Go with what you feel best suits your time, skills and the look you want. Then get to flying!!!!!

Enjoy!

BobbyG