The overall shapes were not too difficult for me, and for a rough sketch, the wood texture turned out fine. The shadowing and the rust spots were the ough part. And I couldn’t leave them out completely, like I could the wagon wheel.
It was difficult to make the rust and the shadows differently, and I experimented with different pencil types. The overall effect does not look so great.
I did enjoy doing the letttering and experiementing with the kenadable eraser to make them look less harsh, as it is an indentation on the mailbox itself. I did not accomplish an indent effect, but the heaviness of the line is light enough.
Original and link. Mine: