coating your photo with oil

6mm steel axis (50cm) 6mm光轴，要硬点的材料
4X 686Z bearings 4个686Z轴承
6X15 silicone tube(50cm) 硅胶管 6X15 内径6外径15
4Xrubber or springs 4跟皮筋或者弹簧

protect your photo printed by dye ink with oil and wax.
maybe silicone oil is ok, i don't know, i bought the oil online.
https://item.taobao.com/item.htm?spm=a1z09.2.0.0.xEUWna&id=522636658514&_u=12skmglc6ed
With one layer of silicon oil, then another layer of wax. Your photo printed on cast