Hey jeepster, I don't know about the first in first out saying. I never went to body shop school and I don't know all the fancy sayings but I told someone that same thing and I might have been wrong telling them that. I never fix a dent the same way. After about a million of them you just know how to do it and get a good end result. Sometimes I move all over the place when repairing a dent. Sometimes I start in the center. Sometimes I start at a edge and work in. Sometimes I tap them out, sometimes pull them out. Every now and then I just paint over them ;D