IMHO you will have a big job cutting micarta with a scroll saw.The media used to make Micarta is tough on blades, especially small,thin ones.
If you tried, it would require a medium toothed blade ,#3-5, with an aggressive set (alternating tooth,skip tooth,reverse tooth,etc.) A trip to a friends table saw or band saw will be a much smarter idea. Bring a six pack of beer, it will cost far less than the several dozen blades you will ruin . The dust won't be good to have all over the place either.
Stacy