yes so without tape you could not get the wheel tread. The smoke all around it would stain it and cause it get washed out. Tape gives good contrast and protects the woods finish around the engraving. If you plan to paint it also acts as a prefab mask.
@Martian thats because that is the raddest forum and you should be a member anyway! That is my first home. This is my vacation home. It is free and there are downloads... not many but I share what I make and so do a few others. Doesnt cost a dime and has tons of good lasering info. Z reached out to Zax and I on there which is how we found our way over here.