Rick Hughes wrote:
On 23/06/2014 22:49, 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


Clean rust off .. could cover with a coat of knotting.
Then primer

+1 - but use an oil based primer than water based (and ditto for the other
coats).

Obvious I know, but some confuse the two and then wonder why, after applying
water based paints, the rust comes back - or the paint breaks down after a
short time.

As for myself, I only used oil based paints externally - even though it
takes longer to dry, it's far more durable and being tight-fisted, I like at
least a 5 year recoat life out of the stuff.

Cash