[Rob. Smith]

Fibreglass over bare steel ? Glassing in the steel frame is a good idea. BUT bare steel will rust, delaminate and rust some more. Un-gelcoated fibreglass likes to absorb moisture or at least wick it in. Do the sika-flex gluing thing but paint the metal with a good sealer first then glass it in. The extra work is good insurance. Silastic products are acidic..avoid them.