1. I use micro sol for the the decals to place them, and if you use that again later it would release the declas off the plastic. I doubt they would hurt the paint job, but I could be wrong. Some people have some old toys and when they take off the stickers it leaves a white mark while the rest of the area may be yellow. Also there isn't a sticky residue after taking off the decals. If there is you can just wipe it right off with some water.
Sorry this is a little off the topic But does any body know if its okay to use tamiya wax. would it mess up the vintage of the yamato. And is it a good idea to apply the wax to the yamie before or after the decals??
thanks