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Thinning paint

Discussion in 'The Body Shop' started by Muddytazz, Sep 12, 2006.

  1. Muddytazz

    Muddytazz 1 ton status

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    Whats a good rule of thumb for thinning out paint to spray?
     
  2. 2Dogs

    2Dogs 1/2 ton status Premium Member

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    Mixing it or ratios??

    Mixing - all I can say is stir-stir-stir.

    Ratios - make it thinner than you would like for the first coat and review the results. This will change with brands of paint, temperature, etc....
     
  3. Muddytazz

    Muddytazz 1 ton status

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    I'm basically using Rustoleum paint that is suppose to be thinned (if needed) with mineral spirits.
     
  4. 2Dogs

    2Dogs 1/2 ton status Premium Member

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    I would start with about 50/50 and STIR forever. If you are painting a bunch you can start making slow changes to the ratio like 52/48 paint/spirits.

    This is assuming you have a good gun and air source etc....

    I just did my bumpers and other accessories in industrial paint. Came out great!
     
  5. Muddytazz

    Muddytazz 1 ton status

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    About what air pressure at the gun were you running or do you remember?
     
  6. 2Dogs

    2Dogs 1/2 ton status Premium Member

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    My gun was not fancy - no gauge. My compressor stays at about 120 so I dialed the regulator on the gun down until it stopped then started turning it up until it pulled paint with no hiccups. I was also shooting during warm conditions like mid 80s.

    PM Ryoken before you start.
     
  7. ryoken

    ryoken Puppy Fabricator Premium Member GMOTM Winner

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    Most paints like 10 to 25 %, depending on what your doing...

    a poorman's viscosity test is what most bodyguys do.. take the wooden paint stick, stir your reduced paint thoroughly, pull the paint stick and count seconds till it stops dripping consistently from the corner of the stick.... thin is a 5 or 6 count, thick is 10, 12 count... Stay a tad thicker on initial coating (maybe an 8 or 9 count), as long as it's not orangepeeling bad, then a bit thinner on your last coats (maybe 5 or 6 count)..

    Generally you want to spray 35 to 45 lbs..

    word of advice, denatured alcohol for precleaning..

    anything else?
     
  8. Muddytazz

    Muddytazz 1 ton status

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  9. Muddytazz

    Muddytazz 1 ton status

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    weird, don't know why the third pic came up as a link, but its there lol
     
  10. ryoken

    ryoken Puppy Fabricator Premium Member GMOTM Winner

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    doh!!

    Didn't realize this was that old... Just saw it....

    Looks good...
     
  11. Muddytazz

    Muddytazz 1 ton status

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    No biggie, just finished painting it on friday. And just now getting around to posting pics of it lol
     
  12. 2Dogs

    2Dogs 1/2 ton status Premium Member

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    How did it go/what did you learn??

    Looks good!
     
  13. Muddytazz

    Muddytazz 1 ton status

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    Just basically guessed "Ah this looks good" sort of thing. Considering the paint I was using (only $8.49/qt), I could afford to mess up LOL But I would say I used a 10%-15% reducer mix.
     
  14. atomicdog

    atomicdog Registered Member

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    For something like rustoleum i think 2dogs is right, start a 50/50.just remember this stuff is gonna stay wet for a long time dep on your temp.It also depends on what kind of gun your using.Gravity or siphon. your looking for atomization, i would try 45psi at the gun and reduce until it sprays a good pattern and doesnt spit.Then you should be close.
     

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