I'm about to start shooting paint on my Lil' Truckee and have a sealer question. The exterior paint is pretty dead (see it in the pic) but the interior paint looks new. I assume I need to de-chalk the outside with 400 grit and then seal it like with DP 40 before shooting the color, right? But do I also need to seal the interior paint or can I just scuff it up with 400 grit before shooting color?
Thanks for your advice,