Sometimes straight alcohol makes the paint dry too fast and that is why I use water along with it.
You can try straight isopropyl alcohol if you like and if it works then that's great.
Let us know what you discover.
Mike
“Wisdom is the right use of knowledge. To know is not
to be wise. Many men know a great deal, and are all the greater fools
for it. There is no fool so great a fool as a knowing fool. But to know
how to use knowledge is to have wisdom. " Charles Spurgeon