I always use alcohol in paints, I don´t like the enamel paints because they smell gives me headache.
So I like to paint with Tamiya and Gunze paints thinned on alcohol. I use an alcohol that here in Brazil is called Alcool Isopropilico (2-propanol. CAS number 67-63-0), it is an Alcohol with 99% free of water, it is used to clean eletronics devices.
On modelling it is so useful to clean the airbrush and to thin paints.
Tamiya and Gunze I used 3 parts of alcohol with 1 of paint for general colors, works so fine. With colors like withe and yellow I use 2 parts of alcohol and 1 of paint.