ORIGINAL: Rcpilot
No, it's not rubbing alcohol.
It's AMMONIA, just like the instructions said.
Why does ammonia work? I don't know. It just does. Mix it 50/50 with warm or even hot water. Spray it on until the outer surface of the wood is wet. Let it soak in for a minute or two. Spray it again and let it soak in. Then bend it around the curve and use thin CA to attach it to the formers.
Where would you even get ammonia from?