I am getting ready to paint my RV-7A, does anybody know preferably how many square feet of surface area there are on a 7A or how many gallons of paint it will take?
How much paint depends on what kind of paint, what color, etc. My experience is just one data point for your reference. 9A is similar to 7A except a little more surface area on wings. You may want to search earlier threads on painting. A few of them gave the amount of paints too.
Scroll to the bottom of the following page and you will find a material list: