I don't see why not. I've never had to,- just migged exhaust myself. Yea, I don't see why couldn't, if you clean it up well.
On the other hand, Dorman sells replacements pretty cheap. I've seen them for as low as $27 on ebay and from Dorman.
Whatever you do, -replace your trans mount. That's why they snap studs @ the manifold. That exhaust damper is bolted to the mount. When the mount wears out, you get allot of vibration thru the Y. This fatigues the manifold bolts. Most likely why yours is cracked.