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  #1  
Old 11-03-2011, 12:07 AM
stevenf stevenf is offline
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methods for gum and motor oil

I am starting a pressure washing business. One bid is for a fast-food drive thru to have weekly washing. I know gum and oil will be the main concern.
Someone mentioned liquids nitrogen on gum so it will chip off...???
And is there a way to remove oil without etching the concrete?
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Old 11-03-2011, 07:30 AM
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Mike B. Mike B. is offline
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Hot water is a must, melts gum off concrete with out damage.
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  #3  
Old 11-03-2011, 10:39 PM
stevenf stevenf is offline
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Quote:
Originally Posted by Mike B. View Post
Hot water is a must, melts gum off concrete with out damage.
I will be using a 3500 Psi 4gpm cold water machine. Any other recommendations for gum and oil? Are there any heaters to install in plastic drums for temporary hot water?
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Old 11-04-2011, 09:07 AM
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Everett Abrams Everett Abrams is offline
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Quote:
Hot water is a must
Couldn't agree more. I would go in the day after a contractor showed up with a cold water washer and show the decision makers the difference. Invest in a hot water washer and you will increase customer satisfaction and keep accounts long term.
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  #5  
Old 11-04-2011, 10:24 AM
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JCinNJ JCinNJ is offline
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for concrete work, more GPM the better
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  #6  
Old 11-04-2011, 05:01 PM
stevenf stevenf is offline
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Is it better to sacrifice gpm and psi for a cheaper hot waters setup?
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Old 11-04-2011, 05:07 PM
rlitman rlitman is offline
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Quote:
Originally Posted by stevenf View Post
Is it better to sacrifice gpm and psi for a cheaper hot waters setup?
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Most people would advise that, yes.
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Old 11-17-2011, 10:38 AM
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Roof Cleaning Virginia Roof Cleaning Virginia is offline
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Quote:
Originally Posted by JCinNJ View Post
for concrete work, more GPM the better

JC - can you advise at what point is it diminishing returns with higher GPM machines? I'm recently advised that runoff then becomes an issue, and excessive water usage. (I'm in the research phase of expanding to commercial flatwork as well.)

Your thoughts please?

Thanks!
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  #9  
Old 11-27-2011, 10:10 PM
stevenf stevenf is offline
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Well I couldn't make myself invest in an expensive machine so I bouught a 3800psi 3.5 Gpm and it works great! Takes gum off with ease. Removes the top layer of oil stains but I'm beginning to think oil cannot be removed....
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Old 12-01-2011, 02:10 AM
mownredneck mownredneck is offline
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Get some purple power degreaser and spray it on the oil spots and let it soak in for about 15min, them wash her off, It wont always get all of it up but the majority. Oil stains in concrete that has been there for a while is somewhat of a pain. Hope this helps.
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