We do extend a bit of abuse to the biggest skillet. Some days when we're having guests over for steak'n'potatoes, we'll load the skillet up with potato chunks seasoned up and toss it on the grill for 10-15mins, turning the potatoes over every 3-5mins.

The skillet comes off of the grill so hot I've ruined one set of hot pads and am working on ruining another set. side note: need to buy some nomex hot pads.

Anyway, the heat from the lump charcoal in the grill takes the seasoning right off. We just re-apply after each time we do this.

Not that much different from dropping your dutch oven straight into the campfire.