Spi waterbourne WG remover ?

Ok so per the SPI special instructions I ordered my WG remover today. 43$ a gallon cheap insurance for "the perfect paint job" so I was reading over on the SPI forum that it is a alcohol based product. The curiosity in me started turning... could you just use regular alcohol ? Rubbing alcohol is 4 dollars a quart so 16 a gallon. Would it do the same thing?