XMas gift.

This is a part of my christmas presents i recieved. :)
http://files.automotiveforums.com/gallery/uploads/81894/Celica.jpg
I think im going to make it clean and box stock. But things I need to know is how to mask the interior. If i want to do the dashboard black and red, how do i mask it. I already know how to mask the windiw frames and rubbers so i dont need to know that. So if you can tell me that would be great.

So I'm guessing its the Tamiya kit, not a die-cast that was already built?

Yes its the tamiya

Here are a couple of problems. Would sanding it down remove the lines in this piture? And im not so sure what molding lines look like but i think these are them. There indents not bumps. Well here is the pic. Car isnt painted yet. This is how car came.
http://files.automotiveforums.com/gallery/showphoto.php?photo=5214&password=&sort=1&cat=500&page=1