I don’t know how well resin will stick to PVC. If you wanted to try, I would make sure the surface is very clean and I would use a primer. I don’t have a primer recommendation, but I do know paints exist for plastic. Even if you get it to stick, I don’t know if the resin will stay on since that type of furniture can be a little flexible. Your resin may pop off!
If you try this, would you mind letting me know how it goes?