You could try car vinyl wrap which is said to be easily removable without leaving glue residue. . Lots of sellers on ebay sell small sizes . I think you can get it in clear or a variety of colours or go the whole hog and try a special finish such as carbon fibre effect
I have never used it but its said to be easy to remove without leaving glue residue. I think when fitting you can peel it off and reposition it, smooth out air bubbles and it can stretch a certain amount to mould itself to curved surfaces.
I believe it adheres mostly through surface tension, any glue used is fairly low tack, (unlike old fashioned "Fablon".)