Re: Decals on a motor
Never got the soap and water trick to work. I'm probably doing something wrong, but after ruining a $40 decal I chose to do it my way now.
If the backer is wider than the decal I trim it so that only the decal is showing. Then I lay it out and find the spot it needs to go. Put masking tape around several spots to identify the postion. Then I remove about 1/3 of the backer, position the part that still has backer on it where it needs to go, then gently roll the unbacked portion onto the surface. Then, lift up the other part, remove the rest of the backer and roll down the rest of it.
Always start from the middle. Remember, once its on, if its crooked you're going to have to like it that way!
The experts recommend 7 days cure on the paint before applying decals.
Look up North York Marine's website. He only sells vintage decals, but his are stickers too, not waterslide decals. At any rate he details some painting and decal procedures.