You can glue right to the covering (Clean it REALLY good now that you got oil on it) with RC-56

http://www2.towerhobbies.com/cgi-bin...?&I=LXR529&P=7

It goes on like White Glue, but it dries clear and works VERY well.

However, a simplier thing to do would be to just use some 1/4" pin stripe tape and go around the outside of the canopy