I'm about to try to cut some G10 fins. How harsh is this stuff on a scroll saw blade? I don't want to use the saw if it will damage the blade quickly. I would rather use a method that would require less blades to get done.
I have used metal cutting scroll saw blades but find they wear VERY quickly. G10 is very abrasive. I killed two blades cutting a 4" hole in this 8" bulk plate.
Try a carbide-encrusted Perma-Grit blade. It will do the job.
If doing straight cuts as on fins, I use a high tooth count carbide saw blade in my table saw. It gives a much straighter cut than a scroll saw but makes lots of dust.
I use my Dremel for freehand trimming, smoothing and cutting G10 with a carbide ceramic tile cutting bit. It is FABULOUS for cutting G10 fiberglass. I cut big holes holes in bulk plates or convert bulk plates to centering rings. I've used this one bit for years and it still cuts very well. It also does not wander in a particular direction which allows precise control of the cut.
From Lowes:
Carbide bit for cutting cement board, ceramic wall tile, marble, plaster, and stucco
For use with RotoZip Spiral Saw System
5 times stronger and 2 times faster than Zip Bits
For straight plunge cuts or trimming I also use a little-known cutter wheel set made by Perma-Grit in the UK. These tungsten carbide encrusted disks will cut through anything. I use them primarily for enlarging or cutting fin slots in G10 or G12 fiberglass or cutting rings for reinforcing bulk plates from lengths of G10 or G12 tubing.
Description: "Two pack of tough mild steel Perma-Grit cutting discs (19 & 32mm) with tungsten carbide welded to the edges. The discs will cut carbon fibre, fibreglass and all other composites with easy and will not 'frey' or shatter the edges of your precious material. In addition, these discs will not break or lose their edge, providing years of faithful service! The discs are supplied with a 13mm arbor, locking washer and M3 nut."
Perma-Grit also make tungsten carbide encrusted hacksaw blades, files and sanding blocks which I find
indispensable for many rocketry related operations.