On Mon, 23 Jun 2014 22:49:01 +0100, "Alaric"
wrote:

I want to paint the fascia board on my garage. It is obviously many years
since it was painted white, long before my time, and there are rust-coloured
patches where there are nails. What should I do to stop this rust coming
through the new white gloss paint I intend to apply.

Any advice will be appreciated.

Alaric
Never tried it but how about knotting or stain block paint just on the
rust patches, then undercoat and finish coat as usual?