How can I finish the unfinished edge of my cladding panels to blend them with the face of the stone?

Yes Dawn, sealing the visible sides of natural stone with stone oil can be very effective at blending/ disguising the colour of the unfinished, cut edge with the face of the tile.

This is particularly helpful not only when using the cladding panels but when using natural slate tiles or pavers as hearths, window sills or coping stones.