The same thing happened to me with the chainring tattoos too. (Though I call them turkey tracks. ) They just stopped happening...mostly.

My worst was in the crotch of my favorite jeans. I was to play host to a guy coming in to train a bunch of our engineers and debated whether I should bring nice clothes in or wear jeans. So of course I put on the jeans and a nice blouse, and packed heels. I took my bike on the bus and as I was lifting it on to the front rack lost my grip and got a huge greasy chainring mark right in the crotch of my jeans. The impact didn't feel too good either.

At least my guest had a good sense of humor. Turns out he commutes by bike too.