Depending on what the interior is made of you can use a dye. It lasts better than paint. You can dye your seats, and use a spray dye on the dash. That's the cheapest way out. Otherwise I would recommend trying to swap it with another vehicle.

Fiberglassing gets expensive quick. Wrapping pieces with material is an option, but this can also be expensive unless you know how to do it yourself.

For the record, I build aircraft interiors. I'm not some punk kid who doesn't know what he's talking about.