Wax-based sacrificial coatings are best used on non-porous substrates that don’t need to breathe.  We use them on our painted (metal) traffic signal control boxes:  since these projects are considered temporary and need to be repainted when their 3-5 year life is over, we can easily remove the wax and repaint the box at the end of the life of the artwork. Non-sacrificial coatings require way more work to remove and repaint. It’s also really easy for communities to maintain their own boxes using a sacrificial product—the damage comes off easily, and a few sprays of product from a handheld bottle recoats the area without having to do the entire box.

Julia Muney Moore
Director of Public Art

Arts Council of Indianapolis
924 N. Pennsylvania St.
Indianapolis, IN  46204
o (317) 631-3301 x240
m (317) 332-8382
e jmoore@indyarts.org





On Jan 6, 2018, at 8:19 AM, David Fichter <muralista@earthlink.net> wrote:

My experience of painting exterior wall murals over 35 years is very similar to that of Jon and CPAG. Any paint, primer, varnish or anti-graffiti product that creates a permanent sealed barrier, will trap moisture and lead to problems. The wall must breathe. I have found that applying Golden MSA varnish which is somewhat removable to the bottom 6 ft of the wall, while leaving the rest of the wall uncoated, will allow you to remove graffiti at the bottom while keeping the rest of the wall breathable. In my experience there are no perfect solutions but immediate removal of graffiti is essential. 

Removing Golden MSA varnish (with paint thinner and xylene) also removes the graffiti on top but it is difficult if there are a lot of crevices and holes. Also you have to revarnish the area with more MSA every time. The varnish is pricey. Sometimes the graffiti will just come off with isopropyl
alcohol which doesn’t affect the varnish. The varnish is very tough. 
But stay away from wax based anti-graffiti products if they are still out there.
Best wishes
David Fichter
www.davidfichter.com

Sent from my iPhone

On Jan 5, 2018, at 6:12 PM, Jon <pounds.jon@gmail.com> wrote:

I recommend checking this out further. Rain that falls at the top/behind the wall will travel horizontally- and potentially out the seams of the MSC. If there is a liner on the back of the wall- good, not perfect protection. If the soil behind the wall is lots of stone and gravel- good. Water will travel to the bottom of the stone/gravel before going much horizontal. 
But, in chicago, its soil. Humidity saturates the soil and then travels through the wall to be Free(!) This humidity will push off/through not permeable pigments and primers.
J

Sent from my iPhone

On Jan 5, 2018, at 12:13 PM, Lange, Christopher <clange@ci.charlotte.nc.us> wrote:

Thanks Jon. These aren’t murals per se but large painted MSE walls for light rail with colors and form liners chosen by the artist. Some type of fill/stone is surely behind them.
 
Chris Lange
Art-in-Transit Program Administrator
Charlotte Area Transit System (CATS)
600 East Fourth Street Charlotte, NC 28202
P. 704-432-2391 / ridetransit.org
 
From: public_art_network@americansforthearts.simplelists.com [mailto:public_art_network@americansforthearts.simplelists.com] On Behalf Of Pontious, Susan (ART)
Sent: Thursday, January 04, 2018 12:50 PM
To: public_art_network@americansforthearts.simplelists.com
Subject: RE: Anti-graffiti coatings on painted retaining walls
 
Dearest HWWODOCPAG,
Oh, venerable one, please don’t tantalize us with your knowledge; what are the techniques you have used to reduce/eliminate graffiti on murals?  I agree that coatings are not the necessarily the solution. 
 
Susan Pontious
Program Director
Civic Art Collection and Public Art Program
San Francisco Arts Commission
401 Van Ness, Suite 325
San Francisco, CA 94102
Phone:  415-252-2241
 
PLEASE NOTE:  We moved our offices Oct. 9, 2015 to
401 Van Ness, Suite 325
San Francisco, CA 94102
 
NEW PHONE Number:  As of Oct. 9th, my new phone number is:
(415) 252-2241
NOTICE: Please be mindful that all correspondence and documents submitted to the San Francisco Arts Commission are public records and as such, are subject to the Sunshine Ordinance and can be requested by the public. If this happens, all sensitive personal information, such as social security numbers and phone numbers will be redacted.
 
From: public_art_network@americansforthearts.simplelists.com [mailto:public_art_network@americansforthearts.simplelists.com] On Behalf Of Jon Pounds
Sent: Thursday, January 04, 2018 7:37 AM
To: public_art_network@americansforthearts.simplelists.com
Subject: Re: Anti-graffiti coatings on painted retaining walls
 

Do the retaining walls have soil/rainwater behind them? Chicago experience is that you want/need a breathable primer in those cases. i.e. gesso breathes much better than polys or epoxies.

There are other techniques (developed over years of conscious attention) that  have been very effective in reducing/eliminating graf on murals (at least in Chicago). Many of our murals don't even have coatings on top of the color - the fewer the layers of paint applied, the better the wall will breathe.

Jon Pounds - HWWODOCPAG

 He Who Was Once Director Of Chicago Public Art Group

 
On 1/4/18 7:58 AM, Lange, Christopher wrote:
Hello PAN ListServ,
 
We are looking for recommendations of anti-graffiti coatings on painted retaining walls that use a two part Sherwin Williams system of Macropoxy 646 (primer) and Acrolon 218 Polyurethane. If any of you have any products you’ve had success with in the past in this type of application that doesn’t affect the finished wall color, please share.
 
Thank you,
 
Chris Lange
Art-in-Transit Program Administrator
Charlotte Area Transit System (CATS)
600 East Fourth Street Charlotte, NC 28202
P. 704-432-2391 / ridetransit.org
 
To unsubscribe from this list please go to http://archives.simplelists.com
 
To unsubscribe from this list please go to http://archives.simplelists.com
To unsubscribe from this list please go to http://archives.simplelists.com
To unsubscribe from this list please go to http://archives.simplelists.com
To unsubscribe from this list please go to http://archives.simplelists.com
To unsubscribe from this list please go to http://www.simplelists.com/confirm.php?u=Ij2IQgwFmOvsRLwIgVh7kb8KBiBUZ8Qf