So, I love the weight, feel, and look of the mousepad type playmats, like the official FFG playmats, but like almost everyone, I hate the slippery, imprecise feel. It's better than vinyl, but still very loose and sloppy, letting ships get easily bumped and nudged without trying, making precise play a challenge. To fix that, I went looking for a way to improve the grip of the fabric without altering the look and without having to adjust all the bases. After researching and testing a few alternatives, I finally found the best solution:

This is Performix Super Grip Home. It's an aerosol spray rubber designed primarily to provide non-skid texture to the underside of carpets laying on floors. In other words, specifically designed to prevent slipperiness on fabric.
The spray can be bought in various places (check google for dealers near you) for anywhere from $8 and up. You won't need a lot of the spray to treat a single playmat, so you could split the cost with some friends to treat multiple playmats. Note, it will degrade a bit with use over time (though this isn't high traffic usage like a carpet, so it will last quite awhile), so whatever remains will be your insurance policy over time.
Use is simple. Lay the mat down in a ventilated area, face up, and spray from about 12-18 inches above in slow, sweeping strokes. You aren't trying to saturate the surface, just sweep it a few times to mist the surface. Trust me, this stuff doesn't need a lot to work and if after first treatment you want a hair more, you can reapply. Continue a few sweeps to cover the surface of the mat, then allow to dry at least 8 hours. This is important! Don't rush it! Let it sit undisturbed.
What you will find after it dries is that the surface is now dusted with a clear, rubberized coating that is NOT TACKY, but provides a rubbery grip like the reverse side of the mousepad or a yoga mat. There is no slippage anymore; ship bases and templates hold firm, allowing for precise movement. I jiggled the mat and table with ships on the mat: they don't move or skid like they used to.
As far as I can tell, there is no discoloration, to cracking or chipping, just a nice, rubberized and grippy surface. It can roll up and travel as normal, though I would recommend storing flat when possible. Also, I will reiterate: let it dry completely before trying to move it.
Anyway, I'm extremely pleased with the outcome. I now have a mat with all the color and imagery I want, but with a super-grippy surface. It's the perfect mat for me and even tournament legal (at least until FFG changes their mind about that mat ruling).
Just wanted to pass this along.... Enjoy!
Edit: one update just to reinforce that you only want a light layer. I went heavy on some test fabric and you can get some rubber "pilling" if you go too thick as the rubber doesn't stick to itself. Keep it light and it'll do ya right. You just need a little traction to help the action. Now, I need to go work on my decloak timing, as apparently I can't stop rhyming.
Edited by R2ShihTzu