Suitable Thinner for MM Semi-Gloss Clear?

Tools, Techniques, and Reference Materials Painting and airbrushing
1

I don’t have the recommended thinner for this acrylic based clear coat so I’m wondering what is a suitable substitute? I wasn’t sure about rubbing alcohol, windex or just plain water. Thanks for the input!

2

I would think iso would work though I’ve never tried it.

3

I would use plain water for that clear coat, but rubbing alcohol might work.

4

I can’t recall where I read it, though I read that someone had ‘determined’ that Model Master thinner was 7 parts 70% USP isopropyl alcohol to 3 parts distilled (though I used tap) water, I’ve tried it in the past and it worked out well.