Sounds interesting. But how did you cut the edge with a chisel without scratching or damaging the laminate? Sounds very risky to me.
I used a chisel because it is flat on one side...

and beveled on the other.

As long as the flat side is smooth an free from burs, there isn't anything to scratch the laminate. One concern would be if you twisted the chisel in your hand, an caught the laminate with a corner of the chisel. However, since it is flat on the back side, it should be pretty easy to avoid this.
Before I use my chisel, I usually lap the back a couple of times to make sure I've remove any burrs.