I had a solution of copper sulfate in (vinegar) and noticed that when I wire brushed certain metals, the copper made a beautiful arrangement on the work piece, often a perfect semi-gloss. The copper is also seemingly bonded to the metal ( can't wipe it off). However, when I use conventional electroplating with the solution, the copper just barely hangs on the surface of the work. And with " dirty " copper as the anode, the result is very poor. So why does this happen? I thought it was the wire wheel depositing a huge positive charge on the work ( which is a pair of pliers with insulated handles. ;) ). Very interesting indeed.