I'm working on my '67 fastback and noticed some light surface rust inside the rocker panel (had to cut some rust out of it) and the rocker panel is completely inclosed (for the most part) so does anyone know of any such paint nozzle i could stick through there in a few spots and it would spray in every direction to get a good coat everywhere? or any thoughts on how to paint in there without cutting it open? thanks for any help.