Alcohol gets in the studio...

...but not for drinking (or at least not on a daily basis).  I use 99% isopropyl alcohol for a fun resist technique.  Although I attempted this technique a number of times with regular 70% alcohol, I had no success with it at all.  Vets use the highly concentrated alcohol in their practice and that's where I get it in British Columbia.  Many other provinces and states allow their pharmacies to carry it.  Do note that for safety reasons, you'll want to do this outdoors or in a very well-ventilated room.

Tools for this technique

I start by gathering water, palette knife, paint, brush, support, spritzer filled with said alcohol and an eye dropper.

A multi-layered start gets into play

Here I'm using a many-layered mat board that started out by mopping up leftover paint, and then more leftovers, and some palette transfers and a journal page transfer - you get the idea.  It's a hodgepodge.

Overall wash, spritzed and dropped alcohol  

I've laid on a very thin wash of golden Payne's Gray overall, spritzed it (on the left) with the alcohol, and  dropped alcohol on the right with an eye dropper.

Alcohol here is lightly spritzed (top left) and splashed with a dropper

Splashing, throwing, daubing with a paper towel dunked in alcohol, etc. are some other ways I've used this for texture.

Three layers of the alcohol technique on the bottom area.

You can do layer after layer with this technique to add depth and richness to your work.

This has a gloss medium base

And when you change the base coat, you'll get a different look.  Why not try it on a gesso base to see the difference there?  You'll love it, as long as you don't drink from the bottle...