Marvin, Tim - Thanks again!
I tested varnish samples using 8 x 10 canvas boards and different varnishes and matte/gloss combinations over a color gradient of acrylic paints (with an isolation layer - since that's what's already on this painting). The Golden's varnishes were much easier to work with than what I had been using - more fluid - brush marks not a problem. I'll be recommending at least a 50/50 mix of gloss with matte since the pure matte Goldens was VERY matte and did result in a quite noticeable lightening of darks. On the other hand, it was easy to apply evenly and easy to remove (Tested that too
). So I'll feel comfortable using it if the client really wants to go more matte. AND as an added bonus, I've got samples of different varnish sheens for the client (and future clients) to select from.
No longer anxiety-ridden about varnishing!!
Yay!