I have regarded Crank Bros Eggbeater pedals as one of the best, and have always bought the SL (stainless steel) versions to prevent rust since I often ride in wet conditions.
However, the last set I bought for the Moulton, I discovered CB have changed the spindle from stainless steel to chromoly which is not rustproof. When I contacted them about this, they responded it is stronger. Fair enough, however I haven't seen a single one of my numerous CB pedals bend their spindles whereas many other ones do.
That
is odd since what appears to be rust is not on the spindle, but rather on the body. CB may have changed the spindle to chromoly steel, but the body and the "wing" portion of the SL should be stainless steel. Their website still claims this. There's no way a carbon steel Eggbeater could have been mistaken for the better models either as the carbon steel ones don't have the grooves left and right of the wings.