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Spray Painting Advice

Discussion in 'Car Repairs / Maintenance' started by efiste2, 10 Oct 2018.

  1. efiste2

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    I have just bought a good DIY compressor (14 CFM/130psi) and a budget spray gun from Machine Mart to have a go at spray painting, I have just painted, using rattle cans, a new fuel tank destined to be fitted to my Escort project, and I severely misjudged how many cans I would need to achieve a good coverage and finish etc etc, and it would have been much more efficient and maybe a better job if I had used a spray gun. So Id like to "have a bash" as they say. I have watched the videos on YT and read a couple of mag articles, but I am struggling with what paint/thinner combination I can use. Forgive my nievity, but can I simply buy a tin of Halfords finest enamel black and add some thinners, then go and spray a few cardboard sheets etc etc. And whwere will I find the info on what ratio of Paint/Thinners to use.
     
  2. Burnerman

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    Just wondered....have you looked at Tekaloid, a brushing or spraying coach enamel - a remarkable product that dates back to the 60’s. A brush finish is almost as good as a sprayed one, and the gloss is superb.
    If you don’t want to go down that route, maybe Hammerite is for you, 25% thinner, 75% paint. It doesnt brush well, but spraying is acceptable.
    John :)
     
  3. Keithmac

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    Might be worth visiting a proper automotive paint supplier, they'll be able to advise and supply best paint for the job?.
     
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  4. Peter.N.

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    Getting a good finish is more a matter of trial and error than anything else. I used to do a lot of spraying in years past, in the days of cellulose, and always had to use more thinners than is normally suggested to get it to flow out nicely. On the other hand I had 'a bit of an accident' with an XM a few years ago and managed to spray the front wing and bumper with acrylic aerosol paint and to my surprise the finish looked almost as good as the original, it was black though.

    I still have a very old compressor with which I have sprayed many cars but buying paint in aerosol cans is so much cheaper that I didn't even consider using the compressor, at least it is at Trago Mills.

    Peter
     
  5. Notch7

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    you might end up with disappointment if you buy a brush formulation for spraying.

    You would be better to buy some paint made for spraying and a decent quality thinners designed for that type of paint.

    Be aware that most paints used these days are 2 pack isocyanate formulations which you definitely do not want to be using -they are suitable only for professional use with air fed masks and proper extraction.

    Thinning the correct amount is important -it is a variable you can control and all paints will the too thick for spraying out of the can. you want a consistency like thin oil. if its poured, the stream should just be breaking up at the lower half or so.

    if your sprayed finish is coming out dry, thats too thick, if you have to spary a really heavy coat and you get orange peel thats too thick. if it runs when held vertically its too thin! You need to aim for a wet edge -if you are getting a dry film thats no good.
     
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  6. DIYedboy

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    Having done a few resprays many years ago, here is my advice, only buy QUALITY paint from a motor factors (the end result is proportional to the money you spend on materials)..
    You'll have to use cellulose. use an antibloom thinner for your topcoat (it'll stop bloom AND allows paint to flow out so avoiding orange peel.
    Always use a viscosity cup.............paint too thick = orange peel
    Adjust your gun (fan pattern and material quantity) on an old panel mounted vertically until the gun's fan pattern is even n not spluttery.
    Trigger off at the end of each pass
     
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  7. opps

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    Speak to someone like morelli for advice

    https://morelli.co.uk/

    My experience of spraying is limited to 2 pack and HVLP. As mentioned by Notch7, isocyanate paints are pretty evil to your lungs. I would guess that cellulose is the paint of choice for you.
     
  8. lostinthelight

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    I would also suggest a moisture trap ,draining the tank and blowing out the lines to lessen the chance of water droplets in the spray
     
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