Depends how much "suntan" the boat had prior. Had the stickers removed on my Mack 15 years ago and still visible. Not super obvious, but you could probably make a template from the ghosts with the right lighting.The previous owner took those same stickers off of my boat. There is some ghosting but it really takes the right light to notice it. Most people won’t notice..
While at Harbor Freight get a plastic razor or on amazon. About $5 and don't have to worry about scratching or gouging gelcoatI do have a Harbor Freight and if it's that inexpensive it will be good to buy..... I need to take off my registration numbers & put new, better looking ones on too.