MOTM

Maybe he's using plastic nuts like these:

http://www.cliffusa.com/info.asp?ID=304

> It's not just the washers.  The nut and washer are both colored.  Let's 
> ask him about it on Muffs.  I bet he paints them.  And if he does, how 
> does he tighten the nut without damaging the paint?
>