Bit of a motor sail

I tried a 4 day antibiotic course but forgot to remove the filter. It reduced the spots but I just came back from a 2 day trip and this what she looks like :(

The bumps are cloudy looking and some of them move with the water.

Bought a 1984 Hunter 27 recently. There is some exposed lead on the keel where some paint is chipping off. Any advice?