In article ,
"Alaric" writes:
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.

I have always found it much easier to replace with new, than to
prepare/repair for repainting, particularly in-place.

When you cut the new pieces, after temporarily fitting to check
for size, you can take them down and prepare/finish them in the
dry, refitting when finished.

Remember to let any new timber dry before choosing the pieces
to use. If you buy it from one of the sheds, you'll need to
buy about 3x what you need and choose the best 3rd a month
later. Another option is plastic facia of course.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]