Lawrence Zarb wrote:
Last year I painted my new staircase without treating the knots with
knotting solution. Now the knows are bleeding thro.

If I repaint the wood, how should I treat the knots?

Do I need to strip back to bare wood and treat them with knotting
solution, or is there something that I can put over the existing paint,
before repainting?

I don't know for sure, but if it were me I'd strip back to bare wood.
In fact it IS me in a way beacuse I hung 8 new doors last year and had
a mini-production line going for knotting and painting. On one door I
completely forgot the knotting and it's bleeding through already. So I
plan to strip back to wood over the knots, apply knotting, reapply
paint, feathering and sanding until I've made it look as good as I can.
When I get time... after all the other stuff has been done...

--
Steve F