Layered this 8 x 10 canvas with black, green, and yellow spray paint and engraved over it. The lightest color goes first and let stand 30 minutes between layers. Once the final layer is placed, let the paint cure till the next day. The image is engraved as a negative image or with inverted colors. Aside from the paint curing time, the project took about 2.5 hrs to engrave.