Ed21 Posted July 4 Share Posted July 4 Hi All, I've got a fair few wooden exterior painted garage/shed doors that have been adapted to fit with repairs additions and have been fully prepped with solvent primer & solvent Crown grey undercoat. The actual finshed colour looks pretty good as is. I've got a 5lt tin of Sadolin Exterior UV barrier Varnish going spare, so any reason why I should'nt just use this on top of the undercoat instead of buying a gloss topcoat ? Ed Link to comment Share on other sites More sharing options...
JohnMo Posted July 4 Share Posted July 4 1 hour ago, Ed21 said: Hi All, I've got a fair few wooden exterior painted garage/shed doors that have been adapted to fit with repairs additions and have been fully prepped with solvent primer & solvent Crown grey undercoat. The actual finshed colour looks pretty good as is. I've got a 5lt tin of Sadolin Exterior UV barrier Varnish going spare, so any reason why I should'nt just use this on top of the undercoat instead of buying a gloss topcoat ? Ed No reason not to, as long as you don't get a reaction from the two. 1 Link to comment Share on other sites More sharing options...
Alan Ambrose Posted July 5 Share Posted July 5 Maybe try out a little bit to check it doesn’t look horrible? 1 Link to comment Share on other sites More sharing options...
Ed21 Posted July 5 Author Share Posted July 5 3 hours ago, Alan Ambrose said: Maybe try out a little bit to check it doesn’t look horrible? Yes I'll be doing a test piece and the product is all good branded stuff and solvent based, . I was more concenrtned about longevity and potential hassle when or if it needs a recoat later on. Link to comment Share on other sites More sharing options...
Alan Ambrose Posted July 5 Share Posted July 5 Well as far as I can see they're both (as it happens): Resin: Alkyd. Solvent: Dearomatised White Spirit. So maybe ... otherwise you're doing a chemistry experiment. Link to comment Share on other sites More sharing options...
sharpener Posted July 5 Share Posted July 5 I think if the appearance is going to be acceptable you will be OK, particularly if they are both based on the same resin polymers. Most of the covering power in a paint system is in the undercoat, it needs UV protection though which the varnish will provide. We had a continual problem with a damp stain bleeding through on a chimney breast. International Paints'(*) Stain Block was completely useless but two coats of Ronseal matt polyurethane fixed it and would take matt emulsion on top. * makers of the famed International Yacht Varnish which says on the tin "not suitable for exterior use". Link to comment Share on other sites More sharing options...
johncraig8229 Posted July 19 Share Posted July 19 I would've said not to bother, but yeh as one of the previous comments says give is a test before using it if you decide to Link to comment Share on other sites More sharing options...
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