I just finished a great foiling session will post a video on a different thread.
But after realizing I can see two tiny spots of what looks like foam at the front bottom of my fin box on my beloved sb formula 162 ( SEE PICTURE). This makes me confused because that would mean the fin box is super super thin at Least right there it is. Like 1 millimeter thick.

Any help or advice would be appreciated.
had vasale inside that's why it looks shiny.