A reader sent me some good questions about Magic Glos vs. Colores Doming Resin and doming effects so I thought I’d address resin a little more.
To answer her question on whether I tried it on paper as opposed to just over Diamond Glaze--I did try just the magic glos on a paper item about 5/8" in diameter. I had to do several layers to get the thickness and "dome" effect I wanted. I don't remember bubbles being a problem with that but I still felt like I had to babysit it--maybe I'm just paranoid. However, it eventually cracked! I've never had Colores crack on me.
There should be time to catch initial bubbles if you first work in the shadows before moving into the sun--but once in the sun, magic glos does cure fairly quickly. John Golden has a good video up on youtube using magic glos & he had bubble issues--it's interesting to watch his system--he also has a video on using Easy Cast Resin.
She wanted to know if I had to do several layers with Colores to get the doming effect. I only do one layer, one last check for bubbles (blowing lightly through a straw will take care of most of the bubbles), cover with a box to keep out stray particles & leave overnight to cure. I usually mix 15 or 30mm worth of resin (1/2 or almost 1 medicine cup respectively) & do a bunch of jewelry pieces at once to save on the cups, sticks & gloves. You can definitely make more pieces for your money with Colores than with the magic glos. Of course, if you only plan to make a few items for gifts, personal use (not necessarily to sell), then it might be more of an investment since Colores only has a shelf life of six months.
But back to the doming--I personally think the doming works better on flat surfaces. Everyone always asks me how I keep it from running over. The short answer is: surface tension. As long as you add a little at a time (and you’ve mixed it well and with two equal parts), you can bring it to the edge and it won’t go over. If you use a bezel cup you have to keep adding more to get the dome-- to the point where you think you're about to spill over--but you really won't because of surface tension if you're careful. That said, don’t be surprised if your “cup runneth over” a few times before you get the hang of it!
If you really love the big bubble look, I’d recommend finding bubble glass (can be found on etsy) to put on top because you really won’t get THAT much height with a doming resin.