Fibreglass ? Insulation

Folks,

I have both exhaust pipes off at the catalytic converters as well as just before the rear axle. There is what appears to be a fiberglass wrap around the rubber hanger (isolater). Can this be removed without destoying it? I want to remove the body side hanger and clean it up and repaint but do not want to destroy the wrap (insulation).

Any suggestions are greatly appreciated. I have the axle out to changer gear ratio and needed to have the mufflers out of the way to get the upper control arms out to be sand blasted and repainted.

thanks

Chris