I built a Billykart when I was a kid using a discarded fiberglass bucket seat. Believe it or not, it took me a while to figure out what was making my back itch.
Yeah, you're not going to have good results with contact adhesive if you don't plan first. A good plan for something like a bucket seat is to scotch tape wax paper over it, with a small edge exposed. Start there and peel back the wax paper a little at a time, replacing it with the covering.
I used to spray paint for a living for a while, and mount fish which required spraying lacquer as well. Got buzzed on it a few times. But, between it, and the deadly PRC fuel tank coatings I sprayed on F-16 parts, I developed an allergy to lacquer. I couldn't be in a house when they were spraying lacquer. It wasn't giggle, giggle, we got a buzz, it was getting all the symptoms of the flu, and being in bed for 2 days.
Quite the problem for a guy working on large houses when some builders just thought they could trow carpenters and painters together.