Question: How to prepare rubber surface for applying patches.
Option 0: Clean all surface areas with soap and water let dry in a area were dirt and dust is not present, read the direction that come with the purchased patching material apply follow as directed, let store in  a dry area and let dry .
Option 1: Clean all surface areas with soap and water let dry in a area were dirt and dust is not present read the direction that come with the purchased patching material apply follow as directed, let store in  a dry area for drying time that is written specified in instructions that came with patches.
Answer: 1