Bamboo Helmet Stands

I make Helmet stands for Collectors of Militaria. The US M1 helmet is very popular when used with the Camoflage helmet Cover used in the Vietnam War. I recently had access to freshly cut bamboo and used it on the display. It was well received and I was asked if it was avaialble.

My question is can the bamboo be preserved enough to maintain it's strength and not rot? It would be wonderful if it could retain that beautiful green color but I know that's impossible. Even if it dried to brown it would work in the display. The section I'm using are about 1 1/2" diameter in 12" sections. I can tell the stalk is already getting soft. So I can't save this batch but maybe the next? Thanks.

Bamboo Helmet Stand