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Looking for 'Goo' Users

Discussion in 'Projectors, Screens & Video Processors' started by BBD, Oct 27, 2004.

  1. BBD

    BBD
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    At the weekend I painted a MDF screen with Goo paint using a roller. So far I'm not very pleased with the results. The finished screen doesn't have any roller marks but the surface texture is not as smooth as I was expecting. The resulting image looks soft compared with my home made black out blind screen. I've ready a few posts where people have remarked on how roller marks have disappeared over a period of time. Does the same apply to the overall texture of the surface? At the moment the surface texture is comparable to a wall painted with ordinary emulsion.
     
  2. cwick

    cwick
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    My experience was that the texture didn't noticably change during the curing period ... or ever in fact :(
     
  3. BBD

    BBD
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    I guess by the ':(' that you are also disappointed with the product?
     
  4. cwick

    cwick
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    Yes and no. I think if you're spraying it on, you could get a pretty good finish with it. I just think that rolling it on, and getting a good finish, is nigh-on impossible. I guess if you did multiple coats, rubbed it down (wet) inbetween coats, you might get there. Trouble is by the time you've figured it out you're likely to have run out of the stuff, and it aint exactly cheap :)
     
  5. BBD

    BBD
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    I think most of the texture was created by the (thick) base coat. I think I should have sanded the base coat flat before applying the top coat. I suspect the runny top coat wouldn't create a rough texture on it's own but as you said I'm reluctant to spend another £50+ to find out.
     
  6. inzaman

    inzaman
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    Did you use one of the real smooth foam rollers as i rolled mine and there is a texture buy not to the point of noticing a soft picture.
     
  7. cwick

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    I know I did - the best one I could find in my local B&Q no less :)

    I replaced the Goo screen with a Stewart Greyhawk and find them quite similar in many respects - except that the Stewart has an even surface and is less hot-spotty (if that's the right word). I reckon Goo could come scarily close when sprayed.
     
  8. BBD

    BBD
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    I was initially planning to use a foam roller because of the good (smooth) results I have achieved in the past using them for Gloss painting doors. In the end I used a normal short pile roller as per GooSystems recommendation. They advise against foam rollers because they produce greater roller marks. To be fair I have no roller marks but if roller marks fade away whilst the texture remains then a foam roller would have been a better option.

    I just watched a film tonight and 3 days on the screen has improved in some respects. It is now brighter than the roller blind material when compared side by side. The sharpness has also improved but I can still see the screen texture during pans across peoples faces. It's made my CRT projector look more like an LCD!
     
  9. cosmic023

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    I've currently got a DIY 76" wide 16:9 screen painted with brilliant white ceiling paint with about 5 coats and a 1" black border.

    I'm still looking into doing a Goo screen for my CRT PJ, but i'm pretty happy with the PQ of the current screen, but it was made on the cheap (1" sq softwood and plyboard) and is slowly warping over time.

    Not many people notice the warp in the screen, but i know it's there and it niggles me !! :(

    As noted so far, rolling of the Goo is a tricky thing to do. I would prefer to do a spray job on a new screen, but then finding someone with decent kit to cope with the thickness of the Goo liquid is going to be difficult.
     
  10. mikeaitch

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    I sprayed mine with a cheapish electric spray gun from b& q

    No roller marks, very pleased with the results :clap:

    Would only swap for a top class- Stewart etc- screen-

    Or possibly a Mississippiman Light Fusion screen
     
  11. cosmic023

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    I thought Goo was too thick to use in a regular spray gun, and you needed specialist equipment to spray it ??

    If you can thin it down enough to use in an electric sprayer that would be great !! :smashin:

    Keep the tips & thoughts a commin'

    Cheers
     
  12. cwick

    cwick
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    Goo state that for spraying it's best thinned with de-ionised water.
     
  13. BBD

    BBD
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    Interesting :smashin:

    I guess I could sand back the top coat to a smooth finish and spray it. How difficult was it to spray and how much Goo did you use for the top coat? I have about 100ml left over. If I buy another 500ml do you think that 600ml would be enough to spray a 90" diagonal screen?
     
  14. MississippiMan

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    Certainly, if spraying. Adjust the spray pattern for at least a 6" wide swath, and overlap each row by 1/3rd. while moving across the surface a 2/3 meter a second. Better to spray 3-4 Very VERY thin coats evenly that to rush it and get streaky results.

    Wet sanding the original finish lightly will really help reduce the Texture. be sure to completely wipe away and remaing dust or loose paint.

    Good Luck. Don't mess up! Hope you enjoy the results!

    MMan
     
  15. keith_branton

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    Hi BDD - been gooing the wall in my cinema today. Using roller, done the basecoats so far, so I found your thread interesting.

    Just thought I'd point out that the video on goo systems web site that shows how to apply the stuff mentions the texturing as normal, and it is clearly visible in all their close ups. I would take that to mean it is intended. Does anyone know (mikeaith perhaps) if it really does come out completely textureless if sprayed?

    I was reading a review on http://www.g4techtv.com/freshgear/features/45376/Review_Screen_Goo.html and it says "The relatively thick coat we applied produced a lightly textured surface that improved off-axis viewing. " Since my screen is just over the 4m in diagonal, the slightly wider viewing angle is quite appealing.

    I note that it takes 6 weeks to fully cure, so suspect that sanding and re-doing it before you can see the final result may be a little hasty. - But if you've already done it, can you let us know how it went and if you thought it was worth it?
     
  16. BBD

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    Hi Keith

    I'm glad you reminded me about this post. I've been meaning to report back. The Goo screen is now excellent. I have a piece of the old blackout blind material which I have been hanging over half of the screen to monitor progress. I was concerned that I might convince myself that it was better without a reference to go back to. The blackout material now looks very poor in comparison. The texture left by the roller is also no longer an issue. Even though I can see the texture when viewed in a normally lit room with the projector off. I'm no longer aware of it on bright areas during pans not sure why. I think it must be as a result of a change in opaqueness.

    It's hard to coment on viewing angle because my room (garage) is long and narrow but brightness looks consistent over the angles I can view the screen at.

    I watched the Goo roller video several times before I started. I followed it exactly I think this is why I didn't have any roller marks just texture. The application technique is similar to that used for a Benetton metallic sheen I used a few years back. So I had a bit of practice already. Remember to keep the frame side of the roller cage on the right when working from left to right and support the weight of the roller when applying the finishing strokes.

    I have used 'CRT White' because I have a crt projector. My mate is buying a Sony HS50. He's bought the LCD grey Goo but he's waiting until the projector arrives before using it. I'm looking forward to seeing how it looks on my screen. The comments so far suggest that a white screen may suit this projector better than a grey one.

    'Was it worth it' Yes Definitely!:thumbsup:
     
  17. mikeaitch

    mikeaitch
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    The spraying technique reduced the fineness of the texture to a point where it was of little consequence to the picture.

    If I was doing it again, I would hire a sprayer as the final quality would be even better- and as MM said, keep the coats thin and have patience!

    The end result is worth it! :smashin:
     
  18. keith_branton

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    I finished painting my screen. Very pleased with the results. My projector is a Hitachi PJ-TX100 which is polysilicon lcd, so not quite up to CRT standards, but I also used the CRT White (on the advice of the Goo Systems web site) and I have to say the results are astounding (at least compared with my old delta screen - which must be at least 10 years old by now, and the primed matt white wall that was there immediately before applying the goo).

    I have no roller marks either, and would say that the process was very easy (but absolutely agree with the comments about taking your time and keeping the coats thin) and fairly quick (I did the three coats of undercoat and two topcoats in a day)

    I was thinking of buying a custom made fixed screen at around a grand, but I can't imagine that it would be so much better than the goo screen to justify the extra expense.

    Just need to wait for the carpet to be fitted monday week and my cinema will be finished - except for the scaler I'm thinking of... but I'm sure that's a topic for another forum.

    Thanks guys, for a useful thread.
     
  19. GliderRider

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    I'm new to this (Still cant decide on the Screenplay 7200 DLP or the Pannasonic PTAE 700at half the price)
    Can somebody please tell me why Several coats of Dulux Brilliant white Matt emulsion won't do.
    In anticipation of a good reason, can anyone advise where I might get this Goo stuff in the UK?

    Cheers

    Andy
     
  20. GliderRider

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    Found the Goo at NEXNIX and my questions are answered. Does this stuff smell? I don't fancy leaving all the windows open, it was -2 last night.

    Andy :rolleyes:
     
  21. MississippiMan

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    Not much. No more than any standard Latex House paint. and remember, your not painting a room, just a reletively small area.

    Just crack that window, don't throw it open.
     

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