Unfortunately once the gas was gone the flame went out and the fibrous material worked much like a wick and had very little change. We didn't want to get the stone so hot that it might crack.
Attempt #2 involved a MAPP gas torch. Now we got black charred material turning to white ash on the top. Much better!
Once the entire top has a white ash on it the scrub brush was brought out and holy frijoles, the concrete was appearing and the sunflower was being washed away.
A little more burning and then a serious wash and the stone will be free from the bonds of that very fibrous flower.
Until next time, bye for now,
Jim & Cheri.