Polyps and zoas seam to be amazingly robust, if your water parameters are good.
I bought a large colony of zoas from a LFS because they were very cheap. Like $15 for 100 zoas on this rock. But, some of them didn't look so hot. 60% of them were shriveled up and I thought they would die. 2 months later, they look fantastic.
Keep your tank healthy and your polyps may pull through. Seams like it takes about a month or 6 weeks though. If they aren't rotting and falling apart--leave 'em alone. If any of them looked rotted or start to fall off the rock--suck them out with a turkey baster. Leave the others alone.