Here is a goal: How to remove difficult decals.

Which way makes more sense to accomplish this goal?

Options are: (A). Spray the decals and the surrounding areas with WD-40, lifting the edges to get underneath, if possible. Let sit, then gently scrape away the decal with the edge of a cookie sheet. Degrease the tub with liquid dishwashing soap.. (B). Spray the decals and the surrounding areas with WD-40, lifting the edges to get underneath, if possible. Let sit, then gently scrape away the decal with the edge of a credit card. Degrease the tub with liquid dishwashing soap..
(B).