Ultra Cheap Rust Pigment

+/-60 grams of Iron Oxide-based Rust Pigment for Miniature Hobby purposes.

Some Ideas:
Mix with white-spirits and mat medium to create a dirty-up streaking rust effect.
Mix with PVA and BiCarb Soda to create a rust paste.
Mix with Spackle, Fine Sand, and PVA to create a Martian Earth Basing Texture.
Mix with gel medium to create a rusty slurry paint.

A word of Warning
This should go without saying.... but... pigment powder will fuck up your clothes and stain your flesh. Iron Oxide will cause tetanus, and aids, and covid-3000xl deluxe, oh yeah...and anal warts when entering your bloodstream. Snort it and die. For reals. Not meant to be ingested in any way.
Only use on miniatures that have been sealed with a lacquer or varnish. It's slightly abbrassive and might scratch your paint job otherwise.