by Gadgetgeek » Thu 20 Jun, 2019 4:19 pm
In my experience, they don't really work great, can change the way the surface finish looks, only last a short time, and are pretty nasty from an environmental standpoint. If I was going to try something, I'd go with a nikwax solarproof, soft-shellproof, or Granger's xtreme repel. I've yet to make a scotchguard product do anything super useful. Maybe as a stain preventer, but little else.
Just don't have super high hopes, and see what happens I guess.