Sorry if this info is already out there, my search came up with zero inquiries. Im am going to paint a 15.5 Kingfisher. The interior is already pained like I want. My question is if I use Interlux Brightside paint do I need to use a thinner? Can I open the can and start to paint or are the catalyst involved? I know there are more steps such as prepping but lets assume that is all taken care of. thanks.