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  1. #11
    Rods 'n' Sods Junkie
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    dawolverine is offline
    The Gerson 2K respirator is good, as others have said though ventilation is essential.
    If you're doing a lot of work consider asking your local college that teaches paint if you can hire their booth over a weekend.

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  3. #12
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    I used to be a safety rep. I can tell you that the problem with using filters is that by the time you can smell the isocyanates you've had a 100 times the lethal dose. Which is why only air-fed respirators are recommended. You can use the highest filtering with non-airfed, but throw away the filters after spraying (same day). It's a small cost to protect your health. I have no idea what an air-fed system costs in the UK and these days. I hope that this is of some help.

  4. #13
    Administrator blackpopracing's Avatar
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    Slight clarification on the above post -I agree with it but the use of "lethal dose" is incorrect.
    Overexposure to isocyanates will cause (potentially severe) respiratory issues but unless you are so overexposed that you pass out and remain in the area while comatose they are rarely lethal.

    The filter masks work really well IN CONJUNCTION WITH POWERFUL EXTRACTION By this I mean the volume of air in your booth should be entirely replaced within 60 seconds.

    Filter masks are also ok if used in open air SENSIBLY - IE keep upwind of atomised spray and dont spray massive areas etc.

    This is the type of extractor fan you need - it will shift 112 cubic metres of air per minute.

    https://www.tlc-direct.co.uk/Product...450slashH.html
    Last edited by blackpopracing; 25-06-2020 at 09:50.

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  7. #14
    Compulsive chicken choker English Impala's Avatar
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    Whichever way you look at it, using ANY paint for spraying without the correct safety gear carries significant risks, even "good old celly" isn't as friendly as some would have you believe. However, most amateur car builders simply cannot afford to pay four/five figure sums for paintwork and the number of places wanting to take on anything other than accident work are declining.

    I always found some of the US car forums to be an excellent source of advice for the home-painter as it seems to be a lot more prevalent over there than here.

  8. #15
    Welding Guru
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    Good advice in this post. Especially staying out of the "down wind" air passage.
    I got my extract system for £1 beleive it or not! It was advertised on ebay for £1000 and then changed to a buy it now for a £1. The woman selling it was using it to extract kitchen fumes for a cake shop and it was massively over specced, so had a speed controller fitted to the 24" fan. The hood it served was 4mx3m. She dropped it to £1 as she had ended her lease and the landlord was charging her something like £1500 to take it out.
    I tipped up, stripped it out and carted it off in a few hours.
    It is mega powerfull on full speed and moves 260 cubic metres an hour!!!
    This is proper over kill and pulls all kinds of crap into the booth and slams the door shut (even with a 1500mm sq filter cartridge) great for solvent degreasing though. I use it on half speed it and it will still pull the paint away from where you are pointing it if you use an aerosol.
    So if you get hold of a big powerful fan you can down tune it a speed controller.

  9. #16
    Compulsive chicken choker English Impala's Avatar
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    Considering the volatility of paint vapour/spray, do you have to have a certain type of fan (just thinking sparks etc)?

  10. #17
    Welding Guru
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    Good point yes you do, atex approved and also suitably earthed. I Checked on my fan and that was ok (over specced).
    A ventilation specialist in work (i consulted before building this booth) said he uses formulas for calculating explosive atmospheres when designing systems but said this is very difficult for spray booths that use a variety of solvents, so better to go down the atex route and over spec so the environment doesnt reach the saturation required to provide explosive risk.
    Another one he advised me to do is put static earth points on everthing such as trestles hanging frames etc to reduce the static discharge risk.
    The same applies for when i am sanding in the booth as the dust can go boom too.
    The large filter cartridges in my booth also act as explosion panels following his advice ( not that i wont get injured in such an eventl) but the building my booth is in wont collapse on me, it will take out the skylights first

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  12. #18
    Administrator blackpopracing's Avatar
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    Quote Originally Posted by weldtech View Post
    Good advice in this post. Especially staying out of the "down wind" air passage.
    I got my extract system for £1 beleive it or not! It was advertised on ebay for £1000 and then changed to a buy it now for a £1. The woman selling it was using it to extract kitchen fumes for a cake shop and it was massively over specced, so had a speed controller fitted to the 24" fan. The hood it served was 4mx3m. She dropped it to £1 as she had ended her lease and the landlord was charging her something like £1500 to take it out.
    I tipped up, stripped it out and carted it off in a few hours.
    It is mega powerfull on full speed and moves 260 cubic metres an hour!!!
    This is proper over kill and pulls all kinds of crap into the booth and slams the door shut (even with a 1500mm sq filter cartridge) great for solvent degreasing though. I use it on half speed it and it will still pull the paint away from where you are pointing it if you use an aerosol.
    So if you get hold of a big powerful fan you can down tune it a speed controller.
    I think you mean 260 cubic metres a minute?

  13. #19
    Administrator blackpopracing's Avatar
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    Quote Originally Posted by English Impala View Post
    Considering the volatility of paint vapour/spray, do you have to have a certain type of fan (just thinking sparks etc)?
    Well, no not really. In theory, yes but as you are extracting you will never get to the point of an explosive atmosphere.
    Do you fit explosion proof light switches in your garage? you should if you use a battery charger.

    Weldtech is correct in terms of health & safety - but in real life being sensible circumvents a lot of H&S.

  14. #20
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    Quote Originally Posted by blackpopracing View Post
    I think you mean 260 cubic metres a minute?
    Yes i did. Thanks for the correction. The fan does 16300 cubic metres an hour and i calculated but forgot the minutes

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