I have 2 inch thick Fiberglass material and I wonder how to cut with best finishing ?
I have a router CNC with up to 20000RPM spindle speed.

my questions:
1. what is the feedrate, cutdepth etc to cut the material and at what RPM ?
2. should I use Metal bit cutter like 4 flute endmill ? or I should use the wood router bit to cut the fiberglas material ?
3. how to findout the best cut depth/feedrate etc for fiberglass ? try and error ?

thank you
cal