hi stone

never done it in rodinal
but i have processed both e6 + c41 in coffee
the orange ( and yellow ) masks are killer
but if you can get through them, you get smooth grain.

http://www.apug.org/forums/members/j...evelopers.html

stand develop like everything else ... 25-30mins
the developer was about 4months old, unreplenished ..

good luck !
john