Thank-you very much for all this information. It has been very helpful, and gave me the courage to go ahead and stop procrastinating.
I had some RSG from DickBlick which had to be soaked overnight, so I did that and then heated it the next day in the microwave on medium (I don't have a double boiler), stopping and stirring every 10 - 30 seconds to ensure it did not boil. It took about 10 minutes before the crystals were fully dissolved. I used that mixture straight (i.e. didn't dilute it), and a lot of it, for the canvas's first "drink", and found the canvas tightened almost immediately, and made the drum sound. I applied the glue along the sides and a bit on the back of the canvas too so it wouldn't bring raw canvas to the front when it shrank. So now it's drying, waiting for the second coat.
The RSG didn't have any odour at all, and I was marketed as true RSG. All very easy and enjoyable to do.
Two more questions: How many coats would you put on? And would you use ordinary house paint PVC on top? Would that be harmful?
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