I don't do blocked gutters, gas boilers or anything like that.
Although i could probably fabricate certain car parts from fibreglass. They wouldn't look as good as proper ones, due to the nature of the cloth and resin we use, but they would work.
Loads of fishing up here, but i've never been before so wouldn't know where to start. I'll see if i can dig out some photos i've taken in the past few months.