Unfortunately I cannot offer a direct comparison, so I can only throw my 2¢ worth into the "mix" as it relates to Eco Print Shield, a product I've been using for more than ten years. As with Dan I also vary my mixes. I use the Satin and Gloss varieties mostly, with a bit of Matte thrown in occasionally. I generally mix approximately one liter at a time, which I will then use as needed. As an example, I would mix 50% Satin with 50% Gloss to obtain a more subtle gloss finish. Since I roll it on I also dilute the final mix by 20% with distilled water, as recommended by Premier Imaging. I also keep a diluted mix of Satin only, as some customers want very little gloss. I recently had a customer who wanted Matte only, so I now have that added to my coating arsenal. The only issue I have with Print Shield is its propensity to fall out of solution, thereby requiring a very vigorous shaking before use. It now comes in a heavy duty plastic paint can. I assume the idea is that one would take it to a paint shop and have them shake it in their paint mixer. That would work fine for the initial shake, but as the volume decreases and therefore more air in the can I would never try that method, too much air in the mix in that case. I use a paint mixer that attaches to an electric drill to do the initial mix and before I do a 1 liter mix. Once I have the 1 liter volume I use a paddle to mix before pouring into the paint tray. For the most part that procedure seems to keep it homogeneous, but I also use a very fine strainer to alleviate any small clumps that might have settled. The application is pretty straight forward, a 6" high density foam roller. You will always see lots of bubbles immediately following the coating(especially the second and third coatings), but that's not a problem, they will dry down and disappear. I have another framer do the stretching and she has only encountered one situation with cracking corners. I called Premier Imaging and they said it was probably improperly loaded in the plane in which it was shipped and it froze at some point. The following day I had a call from the distributor to let me know there was a can waiting for me, no charge. I've always found Premier Imaging easy to deal with, mostly due to the fact that there are very few issues, if any.
Probably a lot more info than you actually needed, but I hope this does help on some level.
Gary
