what to use on concrete patio to remove rust stains from metal patio furniture?

Discussion in 'Power Washing' started by bigw, Feb 3, 2008.

  1. bigw

    bigw LawnSite Bronze Member
    Posts: 1,540

    can anyone tell me what to use on a concrete patio to remove rust stains from metal patio furniture? Should i use a chlorine bleach or what? I have a 4000,psi 4gpm cold water pw and a 20'' surface cleaner if this helps with your decision as to what chemical i should use.
     
  2. bigw

    bigw LawnSite Bronze Member
    Posts: 1,540

    wow thanks for all the responses :laugh:
     
  3. Happy Frog

    Happy Frog LawnSite Bronze Member
    Posts: 1,224

    Oxalic acid. (F-8)
    You can buy it from Bob at http://www.pressuretek.com
    Pressure wash first if needed then apply F-8 with sprayer and rince with water after 10 min dwell time.
     
  4. Don M.

    Don M. LawnSite Member
    Posts: 90

  5. jeffex

    jeffex LawnSite Bronze Member
    Posts: 1,933

    muriatic acid available at home depot in garden shop. be careful as it is acid . wear a mask and gloves as the fumes can choke you . pour it on the rust spot. only a small amount is needed and it eats the rust and etches the concrete. then you can powerwash the patio to look even www.deckdoctorpressurewashing.com
     
  6. FCPWLLC

    FCPWLLC LawnSite Senior Member
    Posts: 352

    Third for the Oxalic. Be sure to do entire surface as toy will have very clean areas if done sporadically.
     

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