i used 3 colors. midnight black, coffee bean brown, and a charcol grey instead of the rust color thats pictured here here of folk art water colors. these are the pics that plasticfury took of the paint he used when he was working on weathering the bucket for me but i just went and bought the same ones that ill be using on the rest of the armor.
with a sponge i just wipe the paint into all the cracks and with a wet rag i just wipe most of the paint away to give it that dirty/soot looking effect.