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Heated alcohol will need to be in a pressure vessel. Very mild pressure, but still pressure, or you will realize that your alcohol has escaped. (Or any alcohol that is after the checkvalve, before the nozzle).
If you are going to go that route, and you want to keep a tire pump in the car at all times, you can make the whole thing a pressure vessel and pump it with air. The air will pressurize the fluid and you will not need a waterpump.
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