I would use a wood burner but I also agree that if there is an issue with allergies - get a second set or racks and scratch in BEEF so you know to only use beef on them.
2013 Stumps Classic - Delivered 4/15/13
Large BGE - Rescued 2012
2010 WSM 22.5"
2010 Weber genesis gas grill
Rescued 22.5 Weber One-touch gold
BBQ Guru CyberQ
2011 Built UDS - Retired