What technique can help ease reading of the ply orientation in a graphite repair site?

Wet sanding with 400 grit is beneficial for easing the reading of the ply orientation in a graphite repair site. This technique helps by minimizing dust and debris, which can obscure visibility and make it difficult to see the underlying structure of the composite material. Additionally, wet sanding allows for a smoother finish, reducing the likelihood of rough edges that can happen with dry sanding. The water helps to keep the sanding surface cool, preventing potential damage to the graphite layers beneath the surface and providing a clear view of the ply orientation, which is crucial for ensuring the integrity of the repair. This clarity is essential for assessing and ensuring proper alignment and strength of the composite during maintenance.