Should it concern me that.....

haha - they couldn't really bodymark me at my last race because i had that spray sunscreen on already!

Works so well though - at keeping the sunburns away!

I'm guessing it's the alcohol that's taking the numbers off so well.

It's the petroleum distilates (oil) in the lotion that causes the problems... the best thing I have found to get numbers off is baby oil.

Why do you want to get them off so fast?  I always feel a little sad when they have faded away after a few days - the last sign of my race, gone...

I did body marking at the last Iron Girl Las Vegas, and almost everyone that applied sunscreen after marking had to come back for a touch up.  The funny part was even though the marker came off, most girls had their numbers sunburned onto their skin.