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Does External Gloss Not Gloss Depending When Applied ?

Discussion in 'Decorating and Painting' started by WhiteVanJack, 28 Oct 2010.

  1. Nige F

    Nige F

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    Joe`s a property developer - as far as I know - and an old skol (sic. ) trade person . He knows the craic , something I miss from the old days in the site hut :cry: . I look forward to his caustic posts as much as I do to Jeremy Kyle with my cornflakes ;) .
     
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  3. WhiteVanJack

    WhiteVanJack

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    joe-90,

    Wrong again joe, it's just not your day, you should have stayed in the pub.

    The paint I propose to use for the gloss finish is Dulux Trade Weathershield Exterior High Gloss and guess what, there is no information on the tin or the online data sheet for the paint regarding relative humidity and outside temperature other than "Do Not Use In Extremes Of Temperature". In addition to asking the question on the forum I also sent a question to Dulux online but have yet to receive a reply.
     
  4. joe-90

    joe-90

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    How are you going to measure the relative humidity? Are you going to have a cuppa when the sun goes in?


    The Dulux Lab have got a Webcam ya know. I can see them rolling on the floor in a paroxysm of mirth.

    "G'won read it again Phil - he said what?????" :p :p :p
     
  5. WhiteVanJack

    WhiteVanJack

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    Nige F,

    That explains everything, anyone who has a history of drinking Skol will have severe issues. I knew some lads from Scotland who would drink this stuff in bucket loads, always a good scrap between them at the end of the night after 20 pints of Skol apiece... awful stuff that Skol, is it still made?


    Rgds
    Jack
     
  6. WhiteVanJack

    WhiteVanJack

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    Don't be such a plonker joe, I use the BBC web site as a rough guide to the humidity that's all. Get back to yer two gallons of Skol and reminisce about the old times.
     
  7. joe-90

    joe-90

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    Don't be daft Jack. It's your SKILL level that gives you a good finish - not the relative humidity.

    Learn to paint - not look at Teletext. :p :p :p

    "Hey boys!!! The relative humidity is down - let's get out there and lay some paint before that big cloud comes our way"

    "Right-O Boss Van-Man - we're with you up to the hilt" :oops:
     
  8. WhiteVanJack

    WhiteVanJack

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    Spot on there joe, at last, something we agree about.
     
  9. joe-90

    joe-90

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    Jack, mate. I'm going to have to write to Matron and tell her to lock the office when she leaves the ward. It'll never do letting you go on her computer when she nips out. :p :p :p
     
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  11. WhiteVanJack

    WhiteVanJack

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    joe-90,

    When you write to matron ask her for some "heminevrin" for your disease, there's no shame in it joe.....
     
  12. opps

    opps

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    Hi Jack

    As theDec pointed out, the only major issue is the extended drying time.

    Use terebene paint driers to speed up the oxidisation process (curing). The actual drying process is a function of the rate at which the solvents evaporate, these will be impaired to a degree by the moisture levels.

    As the temperature is dropping the paint will become thicker, i would mix in a bit of owatrol to aid the flow. This does increasing drying times slightly so the driers is even more important.

    Ignore Joe-90. I think his medication is running out...
     
  13. joe-90

    joe-90

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    I wouldn't want you to go short Jack. (I've never heard of it but Jack obviously has). ;)
     
  14. opps

    opps

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    BTW the humidity levels will impact on the way the paint flows!!! along with the airflow and temperature. This is even more obvious with the weathershield gloss which is a great paint but can be a pig to work with if not using additives.

    Whilst paints have additives to absorb and disperse UV light (in a way that mitigates the risk to the other compounds) I don't think that light affects flow etc.
     
  15. WhiteVanJack

    WhiteVanJack

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    opps,

    Thank you for the replies.

    I have some owatrol as I bought it on your recommendation from previous discussions. If I understand you correctly I should add both owatrol and terebene to the gloss (owatrol for flow, terebene for curing) before using it. What sort of ratio of each per litre of gloss would be appropriate or is it "add a touch and stir to use and add a bit more if the flow is too sticky.

    I think joe has been sniffin the "china white" mentioned in the "yellow gloss" thread he is contributing to. Joe, you aint a descendant of Nostril Darmus, that guy who could see the future after sniffin a bit o' gear are you ?


    Rgds
    Jack
     
  16. opps

    opps

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    Hi Jack

    No hard and fast rules re the quantities.

    The terebene is purple but doesn't seem to affect the paint colour. I add about 2.5-5% or less by volume (never really measured it).

    I have only used terebene since Feb so I am still tweaking the levels. Given that the result is delayed it is hard to gauge the optimal amounts.

    Owatrol is probably about the same but if it is particularly cold add more as required.

    I do recommend that you buy a few plastic paint kettles, ones with handles. That way you will only be bastardising as much paint as you need at any given point in time. It will however be ok to pour the remainder back into the original tin. By having more than one kettle you can let the others dry rather than using on that is only had one evening to dry.

    Milk bottles cut in half will suffice if you don't have any kettles but they aren't too easy to hold up a ladder.

    I like to apply two coats of gloss on exteriors for both durability and aesthetics. You don't need to sand between coats. That is only necessary if the paint has fully cured. In the event of mother nature deciding to blow crap over your gloss expect to wait a few days before you can sand the crap out. You will however be able to run a cloth dipped in white spirits over it to knock any big bits of grit (or insects) the next day.

    I don't know if you have started to gloss yet- be warned that the weathershield gloss drags a lot, hence the need for owatrol. Do not apply to thickly on vertical surfaces otherwise it will slide. By the token do not apply to thinly- I guess that you are using Purdys- which is good as the bristles are not firm enough for you to scrape the paint across the surface.

    Good luck

    Btw if it rains within a 3-4 hours of you glossing you will get pock marks in the paint. these will be obvious once the gloss gets dirty.

    Don't worry about the undercoat getting wet. At home i have left the undercoat as is for years before recoating and glossing. It is amazing stuff.
     
  17. joe-90

    joe-90

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    If you guys could paint you wouldn't need all that crap. If it was necessary the manufacturer would add it at the factory.

    Dunno what's happened to this painting forum of late. It's full of clueless muppets.
     
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