I had endless trouble chroming my cam and engine side covers. Believe me there's an art to chroming aluminium and if you choose to go this route use an electro plater with plenty of experience in chroming aluminium. Finally I ended up with a chrome cam and sprocket cover and polished engine covers! The sprocket cover will be replaced eventually an I'm happy with the chromed cam covers.
The pic doesn't do the side cover justice. It's better in the flesh...
