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Reverse Graffiti with Pressure Washer

Reverse Graffiti with Pressure Washer
Expanding upon other reverse graffiti instructables and works elsewhere this is how you can create bright and clear street art and engage the public on issues of importance in your community with the help of some friends and a pressure washer.

This technique is very effective for etching designs into sidewalk grime but also has that "What the hell are they doing?" appeal for direct dialogue with the public. We did not attract any unwanted attention from police or security guards as we put our messages on public property. We used this technique in broad daylight, issued a press release and there were 14 of us who spoke with passersby. Check with the laws in your area.
 
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Step 1Equipment

Equipment
This approach is more cumbersome than the bleach method but is non-toxic. The generator will produce air pollutants and carbon dioxide but is quite minimal when compared to the impact of a single-occupancy vehicle at rush hour. No SOVs were used in the making of this action. I looked into electric solar generators that are available in Canada but the largest is only 1200W- not enough for a 15-16 Amp washer. Sometimes you do gotta say it with hydrocarbons.

You will need a minimum of 4 friends to implement but a group of 8 or larger is far better. Some can speak to passersby about your issue while others get wet and wild.

We did this action in downtown Vancouver on foot. If you intend to use reverse graffiti in other areas, like freeway overpasses for instance, then you will require additional safety and other equipment. As ever- safety first.

Most, if not all, of the equipment could be borrowed from family, friends and local organizations that are supportive of your cause. The generator rental and the stencil lamination are the pricey items.

Equipment List:

- Consumer grade electric pressure washer (1200 PSI)
- Narrow spray nozzle
- Plastic/laminated stencil
- 20L/5 Gallon water jug
- 3/4" hose adapter
- 10' hose
- Plumbers putty or tape
- Bucket
- 3000W gas generator (quiet model)
- Dolly
- Extension cord
- 4+ traffic cones
- Rain gear and waterproof boots
- Eye protection
- Water source
- Costumes
- Leaflets
- Petitions
- Clipboards
- Pens

For stencil production:

- Exacto knife
- Hard surface
- Straight edge
- Basic graphic design software
- Access to printing and laminating services

The easiest way to make the stencil is to create your design, have it printed and laminated and then cut it out with exacto knives. Our stencils survived 20 applications at 1200 PSI but that was the limit. The paper inside the laminate will disintegrate through water entering the open edges but the plastic will remain intact. Avoid thin strips in your design.

I used a plastic hose adapter for the water jug but it bent slightly very early on which resulted in a small but bothersome leak. Next time I'll try a metal adapter. The generator and most of the equipment was moved on a dolly. A second dolly or handtruck would make water hauling more convenient if you do not have a water source nearby.

The pressure washer will require a feed water flow rate of 1.5- 2 gallons per minute (check the manual). I did employ a stand at first but the flow rate from waist height only resulted in middling performance, even when tipping the jug. Optimum performance can be achieved by using a gravity feed approach by holding the container at head height. You may have to increase the size of the air inlet hole in the jug.

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21 comments
Jun 27, 2010. 5:39 PMtypo3150 says:
Wonderful and hope your transit goals are realized.
Jun 27, 2010. 5:37 PMtypo3150 says:
Love how you discuss your strategy! I hope to try this.
Sep 17, 2009. 4:38 PMadvertisingguerrilla.com says:
Nice work, green advertising is the future. A typical advert would last around 3 months. But they can last 5 months or more!
Jun 1, 2009. 2:54 PMDamage, Inc. says:
I really like this. It seems a great way to convey your message without damaging the look of the area, as many people consider typical graffiti to do. How long did the messages last for? Also, did they evoke a significant response from people, or have much of an impact? Great idea and excellent implementation.
Jun 1, 2009. 6:59 PMDamage, Inc. says:
Wow, that's awesome. I really like the temporary aspect of the whole thing. Out of curiosity, did the petition work?
Jun 2, 2009. 3:38 AMluvit says:
i secretly reverse graffiti dirty cars with political statements
Mar 4, 2009. 4:01 PMGamer917 says:
gordo means fat in spanish
Jan 3, 2009. 4:34 PMaguness says:
hi, this it great! Can you tell more on the stencil itself? Which material did you use and how did you laminate it?
Apr 17, 2008. 7:51 PMcry_wolf says:
I like it, but its too publicized and wanting attention in my opinion. I understand that you want to convey your message, but doing it in a way thats discrete and just seems to "pop out of nowhere" would grab more attention than an overly attention focused public display. I like it, but id rather do this in the night, or even during the day in a more casual manner. Then when someone would walk past, they'd see you're message which would allot time for them to think about it. This is similar to what graffiti artists do. Banksy for example lays down tons of political messages in discreet ways but gets tons of people to get the point. Nice instructable. :D
May 4, 2008. 3:06 PMValche says:
...during the day in a more casual manner.

"Hey, uh, what are you doing?" "Oh, me? Just uh, you know, cleaning my stencil."
Jan 2, 2009. 10:26 PMToulouse says:
i guess it's just a different style of presenting your message... for my instructable, i just did it and got out of there
Jan 2, 2009. 10:24 PMToulouse says:
wow! I'm surprised to see what a production you guys made! Awesome work! glad to have inspired some of it! :D keep up the great work, and if i get a hold of a pressure washer anytime soon, i will have to give it a try!
Jul 19, 2008. 2:57 AMramariel says:
you could even pass out water bottles with custom labels that conveyed information about your message, instead of just pamphlets. goes with the water theme and people will find them useful and are more likely to hold on to them instead of just throw them away at the next corner trashcan lol. this would work splendidly in the summer.
Jul 24, 2008. 10:13 PMramariel says:
geez, just trying to help =/
Jul 26, 2008. 2:54 PMramariel says:
Ah I hear you. Hard to tell sometimes, especially with the way alot of people are on the internet. I apologize for being defensive and Im pleased that you appreciate my idea. Im always looking for different ways to deliver a message and Im surprised so many people stick to the old pamphlet-and-sermon method that usually just turns people off. Especially when I think about how all the swag that I usually hold onto are useful things. If anything, I am more inclined to give that company or that group's message a second glance because they at least demonstrated some insight into the audience they are targeting. Secondly, I meant to mention earlier that I am pretty excited about this method of 'clean graffiti' because its hard to take someones message about being green when they're using toxic chemicals to deliver that message. Just the kind of thing that their adversaries love to pick on. Keep up the good work!

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