Thought you might find this helpful in some time, if I remember to update it...
South-east fascia: On old (possibly C19) softwood, stripped bare in places, in other places just rubbed down hard: primer (Permaglaze (as required)), 2x Glidden trade undercoat, 2x gloss Dulux trade Weathershield (BS4800 14C39).
Applied in September 2011, this still looks to be in A1 condition. Weathershield seems to be a top quality gloss to me.
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South-west fascia: 1980s softwood, fairly weathered. Tried to burn off previous coating (bitumen?) but it wasn't much affected by the heat, so just rubbed down really hard. 3 coats of Bedec barn(forest green) (first coat thinned).
North-East fascia: all as above, except this side seemed to have an acylic paint finish already, not bitumen.
Applied July 2013
Barn is very easy to use, and covers well. It gives a mid-sheen, and looks very modern. Crack-filling properties not exceptional, but it has some ability. Was getting touch-dry in minutes (really hot day) but still brushed on all right. You can slap it on as it dries quickly, best not to overbrush it. Only miffed that the colour was more like a grey than a green - still, I chose it!
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The next was a test area. I haven't bothered with knotting, or with any other Holkham product except for the paint itself. So no zinc oxide was added, contrary to manufacturer recommendations, and Liberon raw linseed oil was used as primer instead of the Holkham one.
South-West fascia: 1980s softwood with rubbed down bitumen, also a section of better quality 1980s softwood which seemed to have the remnants of an old acrylic finish. All rubbed back hard. Coat of linseed oil heated by blowtorch, next day 1st coat of Holkham linseed oil paint [2014 EDIT - this paint is still available, but is now sold as "Allback linseed oil paint"] (Holkham green) as thin as I could possibly apply it.
(Also a small test section inside an iron rainwater hopper over the 2008/9 red oxide primer, and gloss system, both in good order.)
Applied July 2013
This paint dries matt. You have to brush it out really thin, so it takes a little bit longer than other paints. The second coat was applied after 24 hours, and the third coat after another 32 hours (in full sun!). The third coat I made a 'normal' thickness, as if it takes a while to dry it presumably is not a problem. Because it can be applied so thin, runs are inconceivable, and it never gets sticky so the old wet edge rule does not apply. Coverage is outstanding. Exceptional life claimed by suppliers. It smells of linseed oil Looks good, hope it works, as I do like this paint.
South-east fascia: On old (possibly C19) softwood, stripped bare in places, in other places just rubbed down hard: primer (Permaglaze (as required)), 2x Glidden trade undercoat, 2x gloss Dulux trade Weathershield (BS4800 14C39).
Applied in September 2011, this still looks to be in A1 condition. Weathershield seems to be a top quality gloss to me.
---
South-west fascia: 1980s softwood, fairly weathered. Tried to burn off previous coating (bitumen?) but it wasn't much affected by the heat, so just rubbed down really hard. 3 coats of Bedec barn(forest green) (first coat thinned).
North-East fascia: all as above, except this side seemed to have an acylic paint finish already, not bitumen.
Applied July 2013
Barn is very easy to use, and covers well. It gives a mid-sheen, and looks very modern. Crack-filling properties not exceptional, but it has some ability. Was getting touch-dry in minutes (really hot day) but still brushed on all right. You can slap it on as it dries quickly, best not to overbrush it. Only miffed that the colour was more like a grey than a green - still, I chose it!
---
The next was a test area. I haven't bothered with knotting, or with any other Holkham product except for the paint itself. So no zinc oxide was added, contrary to manufacturer recommendations, and Liberon raw linseed oil was used as primer instead of the Holkham one.
South-West fascia: 1980s softwood with rubbed down bitumen, also a section of better quality 1980s softwood which seemed to have the remnants of an old acrylic finish. All rubbed back hard. Coat of linseed oil heated by blowtorch, next day 1st coat of Holkham linseed oil paint [2014 EDIT - this paint is still available, but is now sold as "Allback linseed oil paint"] (Holkham green) as thin as I could possibly apply it.
(Also a small test section inside an iron rainwater hopper over the 2008/9 red oxide primer, and gloss system, both in good order.)
Applied July 2013
This paint dries matt. You have to brush it out really thin, so it takes a little bit longer than other paints. The second coat was applied after 24 hours, and the third coat after another 32 hours (in full sun!). The third coat I made a 'normal' thickness, as if it takes a while to dry it presumably is not a problem. Because it can be applied so thin, runs are inconceivable, and it never gets sticky so the old wet edge rule does not apply. Coverage is outstanding. Exceptional life claimed by suppliers. It smells of linseed oil Looks good, hope it works, as I do like this paint.