Building a model airport

Yes, good thickness and good material. No bending anytime and with any work on the wood. Good choice.
 
Yes, extra arking stand to add. Wingtip to wingtip you need a space of about 2 cm: the airplanes wingtips/winglets are relatively close to each other at parking stands, about 10/12 meters that are 2 to 4 cm in the different scales.
Then the wood panel: already grey so you could not have the necessity to paint it, but just realize the tarmac grid and then the parking lines and marks.
 
Top