molding a fiberglass roll pan

so i have a step side silverado and im wanting to mold in my fiberglass roll pan for a cleaner look. can any one give me some tips or some help on how to. thanks

panel bond it, then glass over it on the outside, then mud.

my advise is dont do it. get a steel roll pan. fiber glass and steel do not bond together for very long and it will crack out as they exspand and contract and diffrent rates in the sun.

its a step side so the bed is fiberglass trust me if it was steel welding would be my choice no questions asked

ah well shit didnt relize they were not steel so in that case yes panel bond then glass it