I know you're kidding, but plastic molds are lubricated with a mold release agent before the plastic is injected. The molded piece might get wiped, but all that does is thin and even out the layer of release compound. It doesn't get the plastic actually clean.

If you opt for dual lock, you have the same stickum-to-surface issues. Also, try out dual lock before you use it on a project. If you use a lot of velcro, you can peel it a bit, getting it to release in portions. Dual lock has to release all at once, so if you use the same area of dual lock, it will be MUCH harder to separate the parts.