Noob here probably in wrong room

As I look around I see that just adding repellent can be a mistake. How would I know this is original canvas. I traded a shotgun for this pup from guy on Craigslist. It looks way to new on the one end to be original. I see no tags or anything to state material. In my head I think I'm venturing down the right path. Maybe someone has attempted this path and can shed a little light on this as in mistakes to not make like throwing in machine and hope for best route I've taken. Really though it probably needed replaced and don't want to tell wife just yet I'm an idiot! If I can get her into it one nice weekend she will probably be a new camper. She did not enjoy tent camping and has not gone with me or the kids for last 7 years. Open to suggestions and ideas ....and yeah I seen same stuff at Wally World and have a few cans of stuff here might be 2 different brands to test I suppose.