weird RPO code

[chewychevy67]

so a buddy of mine and i were talking the other evening and he says hes got a truck with a RPO code that says D94 touch up paint. I havent ever seen nor heard of this code and im thinking to myself this must be a typo. so late at night here i am searching all the spid pictures i can find looking for one with this code and wow there was one i found with this on it. Does anyone know what this might have been? i have no clue. i posted a pic of the spid i found on this site for reference.