I assume you mean plating? It depends on the container size. You can plate one end then the other and there is no “seam” line. A tall jar might do best. You need a somewhat deep bath of fluid for good electrical transfer. Look on youtube, there are large pans with multiple anode adjustable positions that allow things of different lengths to plate. I would think a fender stay would double dip fine. Here is a pic of a brass flag holder I double dipped plated.
From what I have read low voltage is best. Some use small batteries even.