I have a new fibre glass race seat and it requires some trimming to fit( negs of buying a narrow bodied Westfield).
Its smooth bum side and rough the other...the edges are smooth round for IVA purposes but ineed to cut this off......
I was thinking angle grinder with 1mm cutting disc in?
A air cut off saw will probably be best as you can keep the speed down, mask it up also along the cut line....... Above all else wear a mask fibreglass isn\'t nice in the lungs!
I have an electric speed adjustable reciprocating saw? Glad you mentioned the Health and safety aspect! I would\'ve steamed into with total dis-regard for my lungs!