Urgent!!

mtngoat

New Member
OrangeCrest said:
You can't rent a hot water washer?

You are going to take hours upon hours with a cold water washer, spend lots of money on chems and it still will look like crap.

May be there is someone else who can do it for you?

Just a suggestion...

I think what OC was trying to say was sub it out to someone and put some money in your pocket ta-boot.
If he's trying to build his own business then I guess you dont want to feed the competion? :)
 

Henry Bockman

New Member
Jason has some good responses for you below, just make sure you completly rinse each chemical from the surface before applying the next one. I'm not sure what would happen if they all mixed or pooled together but I wouldnt want to be around to find out..

Henry




Cement drops- Hydrochloric acid diluted at 5:1, Water based paint - try using aerosol cans of oven cleaner, you may other wise try turpentine if it is oil based. limestone - CLR (Calcium Lime Rust: brush this on straight) or oxalic acid at 10:1 disolved in hot water then brush/ broom it on, or Phosphoric acid at diluted to 20% You should be able to buy all these at your hardware store. I would allow all of them to dwell for at least 10 minutes with the exception of the phoshoric acid I would let it dwell for 30 seconds then wash it off as it tends to leave a white insoluable residue if allowed to dry. You will be able to get these off with cold water provided you have the "Right Chemical" at the right concentration. But as Orangecrest suggested ultimately hot water will make it quicker.
Hope this helps,
Jason
 

alvaro

New Member
Hi guys,
Just got out of the shower, been doing the Job all day. I’m still soooo slooooow!!Here are the results. Followed the pros advice and used Hydrochloric acid in the advised ratio. The solution removed the dry paint from the floor as well. At first, it looked good when wet, but when it would dry, white spots appeared and it wasn’t looking to good. So I rinse, and rinse, and rinse some more. Looked better but not perfect. I thought it could be the effect of the acid so I’ve used a normal detergent to try neutralize it. That seem to work. Lots of scrubbing to.
Did the awnings as well.
Thank you all one more time.
 

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chirobob

New Member
Great job Alvaro,
looks like they are Terracotta tiles and the white stuff may be effleuresence? Hydrofluoric acid at 1-2% is usually successful in treating this, sorry if I had have seen the photos pre I would have recommended that you add some HF to the HCL to prevent this as well as pre wetting.

HF will be quite hard for you to source but you will be able to get it from somewhere, all you have to do with it is research the safety factors and treat it with the 'RESPECT' it deserves.These little adverse reactions can drive you crazy with bricks and pavers. I had forgotten how good those terracotta tiles look- wow!

You may want to recommend to the client that sealing these may be the best option to keep them looking good and coming back annually to reseal them. I would also recommend that the client removes the plants out of the pots and seals the inside of the with a latex based paint to stop the white salts coming out of this.
Jason
 
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alvaro

New Member
Thanks guys
I actually did a lot of pre wetting before any acid application cause I was afraid that the porous surface would soak in the acid and cause damage. Also advice the client to seal the surface but he thought it was too much money for the product and refused.
Jason, thanks again for the HF (and the pots) suggestion. Next time I’ll know.
Alvaro
 

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