Poor man's orotone.
I have tried printing a positive on transperancy film, with my printer. Then spraying the back of the tranperancy with gold toned paint. Interesting results. Can do the same with mounting a positive transperancy with gold colored foil, found in the xmas wrapping paper department of all the best Walmart stores (not that I shop at Walmart).
I know none of this sounds dangerous, messy or scientific enough to be a real alt-process, but sometimes the results look good.