So many of the anti-mould paints are not overpaintable. Looking online
today I see that there are a lot of options that are said to be not
overpaintable. There are some that don't specify this feature one way
or another. I haven't spotted one yet that claims specifically to be
overpaintable.

The best I've seen so far is this offering because at least it has
lots of colour options:

https://www.decoratingwarehouse.co.u...-mould-acrylic

What is the most sensible procedure for dealing with this mould
problem?
--

Mike