I asked Steve Richie and he said Carnauba wax for the playfield. I'd use Blitz brand.

I did not ask about the underside of the window, but maybe some antistatic spray for computer monitors would keep the dust from sticking?

I hear you.

I've used computer monitor anti static on Black Hole and Congo with no damage done. Kept dust from accumulating on the underside.

Computer screens are made of many different types of plastic, so you'd figure they can't sell a spray that is going to damage plastic of any type.

It will slow down in a few days of use.

But hell yeah is AC/DC fun with a fresh wax job!