Peco metal wheel sets came covered in corrosion

[ntpntpntp]

Failed blackening process was my thought on seeing that photo above.  As Alan said the wheels shouldn't rust.

[F2Andy]

If it is rust, soaking in coke might do the trick.

[njee20]

As you didn't buy them from Peco they've no obligation to reply to you (although they are known for good customer service). Your contract is with Peter's Spares. Obviously the difficulty here is the cost in returning. 

[bigdawgks]

I have some good news. I finally got a response from Peco and they have sent me some new wheels.

Looks like my first email went through just fine and it took them about a week to get to it, so all that was needed was a little patience.

They haven't mentioned if they were aware of this issue already but hopefully if anyone else encounters it then will be able to get replacements too.