The laquer thinner dip method works well. Hopefully you have a tire horn. I used to always mount my own years ago. I probably wouldn't use the 10 year old glue. The best stuff for gluing tires is PL wallboard adhesive. Go to your hardware store and buy a quart of it.
Unfortunately nowadays it isn't easy to get foam doughnuts. Mounting them yourself is much cheaper and gets you superior quality if you do a good job.
Remember to rough up the surface of the rim with dremel.
I use Loctite contact cement and it has been working pretty well. I coat the tire and wheel, dip my tire and horn (in my case a airplane propeller cone) in lacquer thinner and slide the tire on. Let it set up over night and go to truing the next day.
It was and is cheaper to glue on tire donuts....I used to cut two fronts out of one rear.
Tire cement, lacquer thinner and two different size shot glasses is all that was needed and then off to the truer.