I was down at Sisters this week and noticed that there are a lot of badly rusting remains of bolts that are next to the new glue in bolts.  I would like to try to clean them up if I can and I am hoping there might be some bolters out there who have some tips.  I'll try prying them out but if that fails I was considering punching them back in then sealing the hole with putty or sika to prevent further leaching of oxide down the rock face.  From what I can see it's only going to get worse left in its current state which would be a shame as these are some of the most aesthetic sport climbs in the state.  Any thoughts?