Fibreglass trimming help required please !

[SeriesLandy]

Angry grinder and 1mm (decent) cutting disc for lines, use a steel rule or thin straight edge to use as a guide for perfectly straight lines.
On my first attempts I used a dremel and an engraving bit for curves but it took for ever and I lost it.
The second time I trimmed the fibreglass I used my jigsaw, with the plastic base cover and a metal blade. My saw also has a function to make you cut quicker and I turned that off.
No chips with either method.
My only balls up was I measured incorrectly and cut 6mm too much off.
The 1 thing that will chip is sharp drill bits.