Air Pressure spray bottle

[retrocool]

I purchased a really cool 1 quart brass/chrome air pressure spray can for detailing the bikes. The question is, what should I put in it?
Simple green? Brake cleaner? Kerosene? Windex with ammonia?
Its nice to be able to sit down and detail with a paint brush and cleaner without reaching for the hose every couple minutes. So what will it be?
Any recommendations?
Thanks

[retrocool]

Talked to a couple different HD shops today about the spray can.
They said they all use them, in the shop its either brake cleaner (cheaper in drums) for specific cleaning, or some kind of "circut board cleaner" or "electrical parts cleaner" which is safe on electrical stuff, as well as paint and plastic. A liablity thing when working on customers bikes.
Someone else suggested WD40, since its cheap, cleans well, and is safe on just about every surface but the brakes and tires.
Any other suggestions out there?