Good stuff, bringing life to an old tent.
We bought a second hand Homestead Deluxe (the big one), perhaps a decade old. We went camping over Auckland Anniversary and experienced a prolonged downpour that caused the tent to leak (mostly from a handful of small holes that had been poorly patched, but the whole canvas area got pretty soggy and saturated), so when I got home I immediately ordered this.
Finally at Easter I had the time and the clear weather to apply this. A few thoughts / tips:
* You definitely need the 5L. This covered the sunroom/awning, fly, and top of the tent, but not the sides. I only waterproofed the outside. I got the tent nice and saturated, but not outrageously so.
* The roller is the way to go. I brushed the awning in the garage which took ages and was awkward (I put it on a clothes drying rack, bad idea). I rolled the rest of it which was much faster and easier.
* It's easier to apply in place if possible. I did the fly next on the grass which was a bit uncomfortable. Doing the roof of the tent was the easiest, particularly as I discovered the roller I was using was able to be combo'ed with a broomstick I had to make a pole roller.
* Boy this was time consuming! I would think twice about getting a second hand canvas tent - it's awesome that Dwight supports these and we can get spare parts and maintenance stuff for them, but the time cost is significant.
* The stuff goes on cloudy and dries clear, and does thicken up the canvas a bit. The smell isn't great, but not super unpleasant.