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Removing spraypaint?
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crofrog


May 25, 2010, 11:39 AM
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Removing spraypaint?
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Any one know a good way to remove graffiti from rock?


gmggg


May 25, 2010, 12:27 PM
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crofrog wrote:
Any one know a good way to remove graffiti from rock?


http://www.omg-facts.com/view/Facts/993

I don't know if it would work for rock, but apparently it works for buildings.


gmggg


May 25, 2010, 12:30 PM
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crofrog wrote:
Any one know a good way to remove graffiti from rock?

Oh. I've also had luck with various spray on oven cleaners. They aren't exactly environmentally friendly so try to soak up the run off and carry it out. The next step after that is either a pressure washer or brush. What kind of rock is it? if it's sandstone, limestone, or anything else low on the hardness scale it's probably best to leave it.


crofrog


May 25, 2010, 12:43 PM
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It's schist.


trenchdigger


May 25, 2010, 12:45 PM
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Taginator + Pressure Washer is the way to go.


crofrog


May 25, 2010, 12:46 PM
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Getting a water supply for a pressure washer would be, difficult...


trenchdigger


May 25, 2010, 1:01 PM
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I've used Taginator without a pressure washer too. If you use it as directed, allowing it to sit for a while before rinsing, it will do a decent job rinsing with just a low pressure wash from a hand-pump pesticide sprayer. For thick coats of paint, multiple applications and/or scrubbing may be helpful. Any way you look at it, it will still take a good amount of water, so fill up some 5 gallon jugs and round up your friends with their haul bags.


gmggg


May 25, 2010, 1:01 PM
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I'm no geologist, but there are a lot of different types of schist, and a lot of possible intrusions that could be affected by a pressure washer. I'm not sure if pressure washing would be the way to go. I'd give some chemical brew and elbow grease the first shot.

With that said there are plenty of portable pressure washers, and you don't need that much water.

If this is on public land you might contact the agency in charge and see if they have the tools. If you volunteer your time and/or organize a clean up event they might lend you their tools for the job. Just be sure to mention that it wasn't climbers who sprayed the rock, but that it is climbers who want to clean it up.


scottek67


May 25, 2010, 4:14 PM
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Bats


May 25, 2010, 4:32 PM
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I want to give you KUDOS!Angelic Thanks for your effort of cleaning the rock. I hate seeing graffitti on nature. I really don't mind it on buildings, but rocks or trees, not cool. Sly


shockabuku


May 25, 2010, 5:00 PM
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LASER.


acorneau


May 25, 2010, 7:25 PM
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Bohica


Sep 17, 2012, 6:19 AM
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Wire brush, propane torch, and a lot of elbow grease are quite effective. No chemical residue, and carbon that won't brush off immediately will naturally be washed off over time by rain and dew.
(Resist temptation to use same method on spray-painters if you catch them. There are archaic laws that prevent people from getting what they deserve.)


redonkulus


Sep 17, 2012, 2:33 PM
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Bohica wrote:
Wire brush, propane torch, and a lot of elbow grease are quite effective. No chemical residue, and carbon that won't brush off immediately will naturally be washed off over time by rain and dew.
(Resist temptation to use same method on spray-painters if you catch them. There are archaic laws that prevent people from getting what they deserve.)

While you're at it, why don't you just take your trusty hammer and chisel and just chip the whole graffiti section off!


sandstone


Sep 17, 2012, 3:30 PM
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redonkulus wrote:
Bohica wrote:
Wire brush, propane torch, and a lot of elbow grease are quite effective. No chemical residue, and carbon that won't brush off immediately will naturally be washed off over time by rain and dew.
(Resist temptation to use same method on spray-painters if you catch them. There are archaic laws that prevent people from getting what they deserve.)

While you're at it, why don't you just take your trusty hammer and chisel and just chip the whole graffiti section off!

As counterintuitive as it may sound, Bohica's method works, and works well. There are no chemical stains left over, and while it sounds like this method would damage the rock the most, I think it leaves the rock looking the most like it did before some bonehead sprayed paint on it in the first place. There was an article in one of the climbing rags several years ago about a guy who cleaned (still cleans?) a lot of graffiti, and as I remember it he said the most effective removal method was wire brushes on power tools.


redonkulus


Sep 17, 2012, 3:32 PM
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sandstone wrote:
redonkulus wrote:
Bohica wrote:
Wire brush, propane torch, and a lot of elbow grease are quite effective. No chemical residue, and carbon that won't brush off immediately will naturally be washed off over time by rain and dew.
(Resist temptation to use same method on spray-painters if you catch them. There are archaic laws that prevent people from getting what they deserve.)

While you're at it, why don't you just take your trusty hammer and chisel and just chip the whole graffiti section off!

As counterintuitive as it may sound, Bohica's method works, and works well. There are no chemical stains left over, and while it sounds like this method would damage the rock the most, I think it leaves the rock looking the most like it did before some bonehead sprayed paint on it in the first place. There was an article in one of the climbing rags several years ago about a guy who cleaned (still cleans?) a lot of graffiti, and as I remember it he said the most effective removal method was wire brushes on power tools.

Today I learned. Thanks! I assume it might depend on type of rock though?


Bohica


Sep 18, 2012, 4:57 AM
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I, too, have experienced the consequences of assuming.
As to your suggestion of using a hammer and chisel, I HAVE found it necessary. When I found "Mike (heart) Jenny" chiseled into the rock, it took me well over an hour to obliterate the message and make it look (almost) like merely an impact chip.
BTW What measures I choose to take, I take on my OWN property, unlike graffitists. "Public" property does not impart the right to desecrate.
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sandstone


Sep 18, 2012, 8:23 AM
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redonkulus wrote:
...I assume it might depend on type of rock though?

I don't think so. Even sandstone is a lot harder than paint, so wire brushes are going to take away the paint first, before they start eroding the stone. As is true with cleaning moss and lichen, it's important to "feather" the edges of the area you are cleaning -- try to leave it looking as natural as possible.

Rust stains from cheap hardware, now that's another matter. The chemicals required to even partially remove them causes visual damage of their own, especially if they aren't properly neutralized and rinsed (which is hard to do at a crag). The moral of the story is don't use cheap hardware that will rust, and if there is some at your crag, take it down and replace it before the stains get even worse.


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