Dear Melissa,
I noticed that the white coating was wearing off my paddle too.  My mixer 
is two years old (and out of warranty).  When I called the 800 number on my 
booklet, the rep referred me to my manual which showed a paddle height 
adjustment screw which could be turned to raise the paddle up and thus keep 
it from rubbing against the bowl and wearing off the enamel.  How annoyed I 
was that I could not lay into someone about this but should have paid more 
attention to the manual from the beginning.
I raised my mixer head up quite a bit (probably more than necessary) and 
have peace of mind now that my family is not ingesting enamel fragments. 
The rep said I could order a new paddle for $14.95 (plus shipping, I imagine).
Sometime I have to call them about the squeak it makes at med-high speed. 
Was it caused by the added friction on the paddle?  Does it just need some oil?
Amy Smereck