Storage containers of all kinds.

Fabrics. From clothes to sofas to window shades to backpacks to fake "pleather". Less and less natural materials are used in fabrics these days.

Signage such as large vinyl billboards or building-covering ads.

Big electric appliances such as vacuum cleaners are mostly plastic these days.

Cables and pipes of all kinds, both indoor and outdoor and under ground. Not big objects, but there are many of them.

Composite materials. Things like Corian (a kind of silica-plastic composite) is popular in kitchens.

You mentioned coatings. So much furniture is industrially coated with polyurethane or similar plastic polymers.

Plastic is absolutely everywhere.

Plexiglass and other brands of acrylic glass.