Cant get it in washington and im 20
It is interesting that we live in a society where a person is mentally mature enough to vote and die, or be maimed for life for their country at age 18, but not mature enough to control their alcohol consumption.
The fish trap exists only because of the fish. The fish in this case is that they don't want a 20 year old drinking alcohol, so if you aren't going to fulfill their deepest fear by doing so, one might argue that you have fulfilled your end of the bargain.
If you are a medical patient, it might be worth discussing with your attorney, as I know 200 proof was readily available to me in the high school and college chemistry labs, long before I was even 18. We just had to log it out as we used it, to have an audit trail showing that it was consumed in our experiments, as opposed to us drinking it.
Interestingly, my group never abused that agreement, yet the drinkers from our school had been binging on illegal beer since before age 14, purchased by an adult.
Perhaps you can also find an adult to purchase the ethanol for you, and closely supervise your use, to insure that your safety is insured at all times and that any that is left over, is immediately safely secured from your access, until you are old and mature enough to be legally trusted with that responsibility yourself?