Sig Koverall, Do I need to dope it??
Roberts:
Koverall attached and sealed (after shrinking) with nitrate dope, butyrate dope for color and fuelproofing.
Except the rear eight inches of the bottom. About four years ago a nasty twig ripped it on landing, the repair was done the same as originlal other than the color coat, I got lazy and used a "Lustercoat" spray can.
The airplane is about fifteen years old, it is a testament to the long life of the fabric covering. It's been through several owners, I got it back after the nasty twig had done its thing. Repaired it, no damage since.
Incidentally, the MDS is the third engine in it.
Bill.