Hmmm - that one is a polyester resin. I can pretty much guarantee that your canoe was built using an epoxy resin. There's a good chance it was West Systems although both System 3 and MAS are pretty common too.
Noah's Marine in Toronto sells West Systems including a couple of patch kits:
http://www.noahsmarine.com/wsmp_west-sy ... -pack.htmlThe patch kits have the 205 hardener which isn't guaranteed to give you that crystal clear finish but it will be a much better option than a polyester resin.
How big are the spots you need to patch? The patch kits are a good size for a field repair but might get to be pricey if you have larger spots that need repairing. It looks like Noah's sells a 1 quart container of the 105 resin and a .33 pint container of the 207 hardener. The resin, hardener and a pump set would run you about $100. The pumps are calibrated to give you proper mixing ratios of resin and hardener. The resin and hardener also have a shelf life measured in years so if you have extra you can keep it around for the future.
As for safety equipment, a dust mask is always recommended when sanding, even outdoors now.
When applying the resin, using an organic vapour respirator doesn't hurt. (eg:
https://www.canadiantire.ca/en/pdp/stan ... p.html#srp ) Some people do develop an allergic reaction to the resin. Working outside will give you plenty of ventilation which is the primary requirement.