I read a couple of posts and am a little confused. Is Krylon fusion a clear shiny coat or is it a type of white spraypaint? I spraypainted my interior white already but I didn't use any clearcoat protection....so my interior now is all scuffed up. Any help would be appreciated.

umm fusion is a colored paint

fusion is just a really good bonding spray paint. Yes its colored white, red, etc. Since your interior is already scuffed id do some more coats of white then 2-4 coats of a good clearcoat protectant. to make it shiny and prevent most scuffing, chipping, and peeling.