Karl,
Your FX X bars are probably not 'bedded' in anything if it was built by a dealer. They did however use a doughnut of silicone around each bolt hole underneath the xbar. Undo the bolts and add a little torque by picking up a bow and it will break loose.

I take my FX apart each season and that seems to work prety well. Never use 5200. You'll be bummed.

Hope that helps!