On 25/09/2019 11:15, Primrose wrote:
On 25/09/2019 11:02, Martin Brown wrote:
On 25/09/2019 10:29, Primrose wrote:
We painted some of our fence panels last year, today I noticed that
there are rusty coloured growths on the painted panels which are
slightly raised.

Does anyone know what this is please?

Sounds like the spore bodies of a fungal wood rot or it might be the
beginnings of lichen growing on the surface. A picture would help.

Lichens are usually pale grey or greenish and slow growing.

Thanks, just posted a link to the pic.


I think its resin too, if its bothering you sand back the affected area
use knotting (white knotting is best for water based overcoats) then
repaint, its unlikely to be 100% but will be less than at present

--
Charlie Pridham
Gardening in Cornwall
www.roselandhouse.co.uk