Window wash in Paint Brush?? Bad idea?

Last night i was starting to plan what weathering techniques i would use on my BM jet pack.

Most people use paintbrush or rattlecans and finish off with a black wash with window wash... and it just came to me...

What would happen if you added some windowwash to the paint for the paintbrush? would the paint dry faster then? (because of the evapouration of the alcahol in the windowwash)

This is if you are using acrylic colours of course...

any inputs? has anyone tried this before?

I think the stuff is toxic, not sure. That would make me think it might be a bad idea to put it through the airbrush. you might not want tiny droplets of a toxic liquid in the air. I don't know if that's actually the case or not or even if it is, if it is a valid concern or not.

What exactly would be the purpose of doing this? Are you trying to get the paint to dry faster? Are you trying to get a semi-transparent wash?
I'm confused.

I mix the paint with the windex and sponge it on with a paper towel.

My main concern was if i used the paintbrush then if i'd by mistake apply too much in one place then the paint will start to run... which would be horrible as it would destroy the entire paintjob.. so i was thinking that the paint would dry faster with the more volitile alcahol.

I was also hoping that the alcahol in the windowwash would make the dropplets smaller and create a better mist.

The idea of the windowwash in the paintbrush was because some have used acrylicpaints mixed with windowwash to weather their items..

If you're using cheap little $0.80 acrylic paints like you'd finger paint with, you just use a rag soaked in hot water and wipe it right off.