The stock Indian gasket (copper both sides) must have the asbestos filler soaked in Permatex aviation gasket sealer, slightly diluted with alcohol, or it will weep coolant. Jack Beck reported that here many years ago, and it works a treat.
Reuse with copper head gasket spray has been fine for me. No worries on bump test gasket reuse, no need to coat.
The better quality head gaskets sold on ebay or gasketstogo.com are considerably thicker. I prefer them now, but just remember to adjust your bump clearance if switching to these (remove gaskets under cylinder). These gaskets require almost no cylinder liner projection and a flat head and cylinder top. If your head is not flat, or you have a liner with some projection above the cylinder, you should stick to the copper India gaskets.
Best Wishes on your restoration project!
Bruce