Many thanks for sharing such a good method, especially with practical example! Will go back to try immediately.
BTW, two small questions:
1. must expose to sunlight? A room with daylight lamp, OK?
2. some part, like the chest of vf-1s (shown below) has other colors, before putting it in the solution, is it necessary to put tape to cover the color part in order to avoid its bleaching?
Thx again for the reply.