I've been trying different ways to mask aircraft canopies with varying success. On small scale tape does not allow me to see the framework underneath and for those that do, after a couple of days masked some adhesive often stays stuck to the "glass". Right now the best thing working for me is some old gold colored bare-metal foil that I have, I can at least see the frame work on those small canopy's. But every now and then even it leaves some adhesive. Any other products out there that will work better?