We are installing thin tongue and groove cladding to the walls of our bathroom, a diy job. It is pine with some knots. I've treated the knots with Colron Knotting Solution - it has a dark brown staining colour. I plan to paint over this with water-based primer and water-based eggshell / satin paint in white. I'm now worried that the Colron stain will show through the white paint. Does anyone know anything about this - are my fears unfounded, will the paint stay white? Thank for any answers.
Shouldn't have any problems, it's a clear liquid & dries clear, some peeps do give knots a second coat, but I've only have used one coat,& no problems.
Doesn't help you now I realise but next time,( if there is a next time) ! Instead of individually doing each knot, give the entire surface a coat of Zinnster 123. This will knot, prime and undercoat all in 1 hit. Leave a nice solid white background for your topcoat so saves time and money (although the 123 is pricy) Very resinous wood may need 2 coats Depending on the opacity of your topcoat, it may indeed need several coats to cover the brown knotting solution. This isn't necessarily the knots bleeding through, just the dark brown of the solution If this does appear to be a problem, just spot prime the knots with 123, as also acts as a stain bloc - very good stuff (clean brushes in meths, only downside)
Sorry Luce, not thinking straight Its Zinnster BIN you want (not 123) It's in a red tin, in case you decide to use
Try Ronseal Knot Block Wood Primer and Undercoat, cheaper than the Zinster BIN, & that Coloron knootting dries clear apparantly. But, I prefer using Barrettine White Knotting, it's a translucent knotting solution.
Thank you @DIYDave. I realised the advantages of the white all-over knot blocks just a bit too late! However, I' have painted on the first coat of white undercoat and the individually-painted knot block 'measles' aren't showing through too dramatically. Unexpected problem now of course is that the white wall is so white that it makes the bath look grey by contrast!
Some of the white can be bright, I'm using Johnstones Aqua water based satin brilliant white here & it is certianly brilliant white, makes the white under coat look dull.
Use a 'white' paint for a less harsh finish rather than brilliant white. Dulux do both in the Trade range.
Yeah we're veering dangerously close to an F&B topcoat now to get a more muted white @Astramax. Don't want the bath to look old!
Trouble is Luce they are as you say 'absolutely lovely'............the only thing I have ever found that's even more lovely than KIAB
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