How do I effectively apply a bell hammer spray to the inner surface and springs of my bike's front wheels for surface treatment?

After separating the front fork
Applying a bell hammer to the inner tube or spring will make the effect easier.
The easy way is to use fork oil (clay will change slightly) around 10%
By adding it, the metal can be effectively changed by sliding friction during running.
The space between the outer and inner parts can be painted at the time of assembling, and the air can be removed by removing the fork oil.
With this, the effect of the bell hammer can be expected.