There are many various ways of doing a rust technique, everything from vinegar and salt, pre-prepared products, rusting items in water and leaving them in there for the naturally rusty look, right through to using other items you wouldn't even contemplate! Hence the rust in this technique is using cinnamon for both texture and colour. Starting out with a black base then adding some brown paint (Burnt Sienna is perfect) and maybe a little of another colour (turquoise?), then sprinkling on some ground cinnamon works perfectly! I have sealed mine when they are dry using a matte medium but you can leave it au natural if you prefer. Chipboard or metal works equally as well for your base substrate as both will take the colour just fine. I find the Ranger Distress Paint is best for rusting your metal pieces as it sticks to metal and you can just use a Black Permanent marker to colour in the chipboard pieces as it is instantly dry and ready to use.
"Heart...
"Trapped"...
"Artifact"...
"Superficial"...
"I rant"...
"Live a life"...
This one below is obviously not a rusty piece but one of the samples from the last set of classes using the corrugated card and chipboard, Corrugated Layered ATC's. Yes I know, there is some pink on it, generally so not me but it works well with the green colour so what the heck!
"Some birds"...