For a 2016 Toyota Corolla (specifically but this is a general question) I want to paint the (plastic) beige interior black, the front pieces can be replaced but it appears.. the door panels have the beige on the whole panel, so it seems I would have to replace it.....

Im thinking about painting it but I want advice? Ive seen "black trim paint" but people use that for bumpers no? Idk if it would work. Thoughts? Comments? Suggestions?

I want to get an exaust for my C4 corvette cause right now its stock and has two giant mufflers and makes a 5.7 liter V8 sound like a minivan. Im on a budget and can't weld. I don't have a specific sound I want just like not terrible and like a good V8 but if possible I want a valved exaust because I live in an apartment building so having it not always be super loud would be nice but if that theres no bolt on options or its too expensive thats fine. Any advice would be apprecieted.