Paint

I have a 12 foot aluminum crestliner . I want to paint the inside I’m leaning toward a grayish textured paint of some sort I have been hunting everywhere I can find the right texture I can find the right color indoor use only I don’t want gloss exterior paint that I see is dark gray and gloss. Anybody have any ideas what I should use?Rattle can would be nice but I can use a roller have no spray apparatus