Krasel Industries Micro Flat and Micro Gloss

Junkie - That sounds kind of right, it may well be Microscale. It's acrylic to the best of my knowledge, I reduce mine with either water or alcohol, I tried using some that was from the mid 70's and it seemed to work fine.

I only use the Microscale range of varnish and have no problem with water for thinning.

yep, that is the old name for Microscale Flat and Gloss

You could contact Microscale at their website to ask them directly, often thought closed, they are alive and well at www.microscale.com/.../merchant.mvc  (they only split off the aircraft lines with Superscale, then almost immediately started releasing their own aircraft sheets again)

Rex

edit, from the very bottom of their FAQ page

"Microscale – Micro Gloss, Micro Flat, and Micro Satin for use on painted plastic surfaces.  These are a water base product."

Thanks guys for your comments.