Well this may not be THE stuff, but I did a black laquer finish on some fork tins for an old BSA. I worked on them for a week of evenings from metal to primer to paint. I finished them by wet sanding with super fine grit, then rubbed them out with rubbing compound (Turtle wax brand I beleive) and finally a good carnuba wax. My old man is a hot rodder and when he saw those tins he was impressed. the rubbing compound is also good for removing scratches in clearcoat. I'm certain there are better brands of rubbing compound out there for modelling and Stormie helmets
Orange peel has nothing to do with painting. It's caused from ABS being overheated when forming. When it occurs you can usually sand the worst off if it's minimal, but that's a bandaide fix for a piece that should be scrapped.
True I've seen actual OATMEAL on burnt up ABS. Truth is orange peel is a painting problem which plagues the majority of humanity and thus such things as fine grit sandpaper, rubbing compounds, clearcoats, and buffers have been invented to combat it.