Just go down to your local Model Aeroplane Hobby shop and buy a roll of Dayglow Orange Oracover heat shrink polyester film. Before you try this out on your fave try it out on a similar test surface first so you get out all the wrinkles
1. Cut the film out into whatever random patterns that you want.
2. Activate the adhesive on the rear with metho/turps so you can [quickly] position it on the stock stretching it as you place it down, with light pressure tac down in one direction. Stretch it in other direction once it is positioned, tac down. Eliminating air bubbles as you go.
3. Gently heat the film with your wife's hair dryer until it starts to shrink .Working from one side to the other eliminate air bubbles as you go using a soft cloth to push them toward the 'unshrunk' edge.
4. Seal it down with a little finger pressure and mild heat all over.
5. If you get air bubbles trapped, prick them at one end with a pin and with gentle heat + finger pressure work the air our through the pin hole.
When you are finished it should have a finish that will stand up to a couple of months hunting. [Until mum is placated]
The colour can always be removed lifting one edge with a hobby knife and peeling, any adhesive can be cleaned up with metho/turps and your resale value remains OK.