Yes, sort of, No. You can see through paper take well enough to line things up usually, color of vehicle and color of vinyl will have some effect. By over lap, do you mean use multiple piece of transfer tape to cover the decal? Yes, it can be done, but it should be avoided. Where the tape overlaps you are likely to get bubbles in the decal. Now if you have say two lines of text you can have the tape overlap in the black space between the letters, no problem. Shape and size of the mark is up to you, what ever works best for you. I typically use a diamond shape, just my personal preference.
    • Like