Imagine a pair of sunglasses for your shoes or boots. Lensing is a technique whereby you add a different colored or shaded lens to the toes and heels of your shoe or boot.
Lensing is different from burnishing, antiquing, or patina, in that the color remains embedded within the wax, and doesn't impregnate itself within the base leather. It compliments leather patina, by adding a new dimension through light effects. This technique uses two key products - Cream Polish and Colored Paste/Wax.
Additionally, you can mirror shine on top of the lensing, for increased color and light effects.