This year I have plated several parts of my coffee machine with zinc to prevent corrosion. This turns out to be surprisingly easy to do at home and I found I already had all the components I needed.
I have plated the bracket which holds the steam boiler in my Gaggia Baby Twin, the bolts which hold the boiler together and the bracket which holds the thermal fuse in place and also acts as a terminal for the earth wire onto the boiler.