Just my 2 cents, but if you wanna master airbrushing techniques, you don't need a playfield, just practice on any decent sheet of wood/plastic/paper.

If you're wondering how airbrushing will 'respond' to being applied to existing paint (playfield art) then just pre-paint a sheet of cardboard, chipboard or MDF, this will give a more realistic feel of how a playfield will react to receiving the airbrush paint.

Pre-painting your sheet of wood will also seal it and stop the paint being absorbed into the wood giving the wrong impression of how it will REALLY react on painted playfields.

The first step would be to get a good feel for your airgun, KNOW how it responds how far it sprays, spreads while mastering air-pressure & distance factors too.
Just go nuts spraying all different angles & distances onto a newspaper.


Airbrushers Golden Rule #1:
You need to master the gun before you can master the painting.

MM