What's your take on fiberglass bodyparts? I'm having a hard time sourcing original steel e30 M3 body parts for my project and been screwed three times with broken promises so getting impatient!

I've located front fenders and rear flares that are 1" wider than stock and they're fiberglass. The front fenders are bolt on but the rears would probably need to be pinned and molded...did I mention i'm really not a fan of fiberglass?!

If you've worked with it and don't mind using it sell me on it. I've repaired a few fiberglass bumpers and never really been much of a fan of it. What's the benefits and advantages, anything special with paint or care, how is long term durability and repairs?