Try this. https://www.google.co.uk/search?q=DPM+camouflage+adherent+cohesive+bandage&client=safari&hl=en-gb&prmd=sinv&source=lnms&tbm=isch&sa=X&ved=2ahUKEwjfxpCEybXuAhVHTsAKHd1OA2UQ_AUoAnoECAMQAg&biw=320&bih=454#imgrc=Mgdpnn6bzovqiM
It is Self Adherent Cohesive Tape. It only sticks to itself, is removable without damaging surface finishes and paint, reusable, stretches so it conforms to shapes and adds a bit of protection to where it is applied.
You can get almost any colour and camouflage pattern. I have used it on lots of my rifles and shotguns.