生鏽是一種由鐵、足夠的水和氧氣所造成的自然化學反應。馬氏收集水管表面上的鐵鏽，並把它造成一些繪畫顏料。她認為鐵鏽是具有時間性的物料，而石頭是一種永久性的物件，作品中嘗試將石轉化成為一個載體，去記錄物事。隨著時間的推移，鐵鏽受到時間的影響，表面形成沒法控制的擴散現象，留下一些侵蝕後的痕跡。

Rust is a natural chemical reaction caused by iron, enough water and oxygen. MA collects and adds powdered iron and rust from the surface of the pipe and makes it into the painting material. She believes that rust is a temporality material, and stone is a permanent object. The series of "Timestamp" transformed the stones into a carrier to record the moment. Over time, the rust is affected, and the painting surface forms an uncontrollable diffusion phenomenon, leaving some traces of erosion.