Posted on January 4, 2020July 30, 2020 By jmrrebuildersJMR Rebuilders – Raptor Liner Prep and Install This week on JMR Rebuilders we take a Christmas Break from our Ford FX4 rebuild. It’s the same guys with a different mission. To sand a truck bed for hours before having the satisfaction of spraying in about 5 jugs of Raptor Liner.