|Cadillac Hood Ornament|
Now you go to your local ceramic shop and commission a hood ornament size statue of Donald (and / or Hillary, depending on your mood) and you order up a hundred or so plaster replicas. A little paint might make them more attractive. They need a hole in the base so they can be dropped down over a peg, a peg that you will stick in the hood of your car, right where the hood ornament goes.
When these preparations are complete, you drive downtown, somewhere where there a lot of people. Pick up a baseball bat along the way. Pull one of your statuettes out of the back seat and drop him on the post on the hood. Put up a sign: $10 to take a crack at the Donald and wait for your customers to queue up. I think you could probably make a fortune, possibly even enough to pay for the car, which might very well get destroyed by overenthusiastic customers.
Plaster-of-Paris might not be the best material. Whatever they use to make exploding golf balls might be better.