Mural Painting Most Rewarding Aspects of Mural Painting
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JUST PAINT Published by Golden Artist Colors, Inc. / Issue 10 for months of planning time in the project schedule. Climate will greatly affect out- door mural work. Climate changes can affect the drying rate of materi- als as well as the mural’s exposure to certain types of weather and extreme temperatures. An under- standing of the specific climatic conditions of each individual proj- ect will help artists choose the right time to work and the right materials © Eric Grohe, “Liberty Remembers”, Bucyrus, OH. Eric paints the fabricated metal cornices he had made and attached to the side to work with. of the building in order to continue the illusion of the painted ledge. Creating artwork for an environ- Research Focus: ment where many people have the opportunity to see it is one of the Mural Painting most rewarding aspects of mural painting. This should also suggest The many considerations an where there is a lot of exposure to the great responsibility of the mural artist will face when embarking on a light. Some colors are known to artist. A mural is intended to mural project may be imperceptible fade rapidly and may only be suit- enhance an environment, not clash to a casual viewer of these large, able for indoor applications. Artist- with it or degrade it. If improperly often public, artworks. There are quality varnishes may offer the best done, the “work of art” can quickly many different types of murals and protection for any mural; however, become an eyesore. Many mural mural applications, and each type alternative solutions may need to be sponsors are now requesting that presents its own set of challenges. explored in indoor settings such as artists guarantee their murals for a The muralist will want to ensure hospitals or schools. certain period (usually 10-20 years). the mural’s integrity by practicing a Because of the large scale of These agreements can be legally sound methodology, accounting for most mural projects, expenses can binding, which means artists will be manifold factors that will influence quickly add up. Knowing how to held liable for problems occurring the project’s success. get the most out of money spent, or with the mural during this time. Whether the mural will be learning some ways to cut costs Careful planning, thoughtful prepa- indoor or outdoor is a major factor without jeopardizing the integrity ration, and use of quality materials that will affect the artist’s methodol- of the mural is important. Also, it is will help finished murals to have an ogy. For an outdoor mural, an artist important to be realistic about the impact that matches the artist’s will need to consider the mural’s quantity of materials needed so that good intentions. potential exposure to light or unexpected expenses won’t add up weather and prepare and protect the late into the project. Using Acrylic Products substrate accordingly. For an indoor Time is an additional considera- for Mural Application mural, exposure to chemicals, tion. To an artist working sponta- Golden Artist Colors, Inc. has humidity, contact or abrasion needs neously or in a limited amount of conducted testing and research on to be considered and accounted for. time, adequate preparation will be using acrylic products for mural The art materials used might extremely important so he or she application. The following para- also change based on whether the can move quickly. Another artist, graphs contain our specific recom- mural is interior or exterior. Certain whose project requires extensive mendations for preparing substrates, colors are more lightfast and are research, preparation, and approval selecting materials and giving pro- more appropriate for outdoor work by many parties, needs to account tective finishes to murals made ©2002 Golden Artist Colors, Inc. Just Paint / Issue 10 2 using GOLDEN Acrylics. For more CAUTION: Never add ammonia or allow an artist to work in his or her information about using acrylics on ammonia-based cleaners to bleach! studio. Painting on panels is a good mural projects, visit our website at: Wear goggles and protective equip- alternative for someone who doesn’t www.goldenpaints.com/murals.htm ment while cleaning. After scrubbing have access to scaffolding or other with a brush, allow the solution to sit equipment. It can be much easier Substrates on the surface for 10 minutes before than painting off a ladder all day. Substrate selection is often defined thoroughly Panels can also be a safer, cleaner by a mural’s location. When work- rinsing off with clean water. way to work with groups of chil- ing on the exterior of a building, If there are cracks and grooves dren or other large groups of peo- (whether it be made of wood, in the substrate, the method for fill- ple. If artists choose to work on cement, masonry, metal, etc.), and ing and smoothing these gaps will panels, they will want to make sure on interior surfaces as well, it is depend on the nature of the sub- they choose the right kind of panel important to know how to prepare strate itself. Artists should consult for the right situation. Preparation the substrate before beginning to an area architectural coatings store of panel substrates will also depend apply paint. Different substrates for recommendations on the best upon the chosen material. may require specific techniques and product available. (See Mural Quick Reference Guide, page 11.) materials. If not done correctly, the Once the surface has been life span of the mural may be cut cleaned, a primer coat will give bet- Paint Selection short. ter adhesion for the paint. One key Acrylics are some of the most Generally, it is always a good feature to look for in a primer is durable and accessible paints for idea to take a substrate down to its whether or not it can be painted exterior application, used by many original surface. Trusting the over by latex paints. This should artists for painting murals due to integrity of previous coatings can ensure that the primer will be a their lightfastness and weather put mural work in jeopardy. It is compatible surface for the adhesion resistance. They also form an excel- also difficult to determine if these of waterborne acrylics. lent bond to masonry or cementous coatings will be compatible with To determine the best primer surfaces. Oil paints are a poor other products that are being used. for a specific surface, we suggest choice for painting on these surfaces If an artist chooses to overpaint artists contact their local supplier of since the alkalinity of concrete can a surface that is already painted, he architectural coatings. Such compa- destroy alkyd or oil products. Ethyl- or she should consider the type of nies have extensive experience with silicate paints form an excellent and the existing paint and its physical priming the broad spectrum of permanent bond with brick or con- condition. If the paint is a water- building supplies, and typically have crete; however this system can be based polymer (commonly referred specific primers for the surface the time-consuming and costly, and a to as latex), chances are good that mural is to be painted on. Their good working knowledge of the the acrylic paints will adhere suffi- recommendations will also take the materials is required as well. ciently. If it is a high gloss oil paint environmental concerns of the area Solvent-based enamels are a good (or of unknown materials), then it into account. Architectural and choice for durability, but manufac- must be abraded (or removed) for maintenance paints are competitive- turer’s pigment considerations are good adhesion. If the existing paint ly priced, meaning that a product usually not the same as with a high- film is deteriorating, then it is best that costs more than a similar prod- quality artist’s acrylic paint. to have it removed (sand-blasted, uct will typically perform better as Golden Artist Colors, Inc. pro- power-washed, scraped, etc.). It is well. duces several lines of paints that can critical to wash any painted surface, When painting on brick, con- be used for mural work. Selecting even a newly painted surface, with crete, or other masonry surfaces, we which type of paint to use is soap and water to remove dirt and recommend use of a masonry con- dependent on each artist’s style and grime prior to application of acrylic ditioner that can be purchased from the surface to be painted. GOLD- products. a commercial coatings supplier. EN Heavy Body, Matte, MSA, Previously painted high gloss In some cases, muralists will Fluid and Airbrush Colors (see surfaces can be cleaned and dulled want to consider painting on panels below) can all be used for mural in one step by using a household (wood, aluminum, fiberglass, etc.) work. The artist must determine if abrasive cleaner. Cleaner must be rather than directly onto a wall. the texture will influence the way he washed off completely with clean There are various reasons an artist or she paints. For example, if paint- water. may choose to work on panels. ing on brick, it will be tough to get Mold and mildew must be Sometimes the existing substrate is a smooth line on such a textured removed by hand-scrubbing with a too difficult to work on. It could surface with the Heavy Body Colors mixture of 1 part household bleach also be a matter of convenience as is. They need to be thinned with to 3 parts water. since painting on panels will usually GAC 200 (which also increases film ©2002 Golden Artist Colors, Inc. Just Paint / Issue 10 3 Quick Reference Chart for Choosing GOLDEN Acrylic Paints for Mural Use Another choice for protecting the mural is to use some of the vari- GOLDEN product Indoor Use Outdoor Use ous graffiti-resistant finishes that are (not modified) commercially available.