Never seen an issue with it before. I'd wash the jerseys once before you play with them just to dampen some of that forearm down, but that's your call really.
Avoid excessive padding. If you'd be mad at another team for using it then you shouldn't use it.
CFOA Referee 2012 -
PSP Referee 2013 - 2015
MiLP Referee 2014 -
NXL Referee 2015 -