Notes

Increasing the Durability of the Paint System

Although GOLDEN Acrylics are optimized for traditional easel painting, the acrylic resin is somewhat soft for mural work, and should be modified with a harder acrylic medium to maximize durability. Adding GAC 200 also reduces the pigment load of the paint mixture, making the paint more binder rich, which extends exterior lifetime. Nature Wallpaper is especially important if the artist chooses not to topcoat with a varnish. To improve the exterior durability of the paints, blend in 1 part GOLDEN GAC 200 for every 2 to 4 parts paint.

For exterior spray application, using GOLDEN Fluid Acrylics thinned with Airbrush Medium will be the most durable option. GOLDEN High Flow Acrylics can also be used, but they should be blended with GOLDEN Airbrush Transparent Extender and given a protective finish to increase durability. In Mural Wallpaper , the GAC 200 is not practical to use as it will thicken the paint, and interfere with sprayability. Another approach would be to topcoat the High Flow Acrylicswith a sprayable isolation coat using a 2:1 mixture of GAC 500:GOLDEN Airbrush Transparent Extender.

FINISHED MURAL PROTECTION
Murals and Architectural Applications
Any paint or topcoat applied to a building, including interior or exterior walls, is considered an architectural coating and subject to regulations limiting the amount of VOC's (Volatile Organic Compounds) a product may have. Murals painted directly onto these surfaces, therefore, will fall under the same guidelines and all paints, mediums, and varnishes being used will need to comply with the same rules. Containers that are 1 Liter (1.05 Quarts) or less in size, however, are currently exempt from these requirements.

Specific Guidelines
Murals Painted Directly onto Architectural Surfaces
PLEASE NOTE the Following Restrictions
Gallon sizes of our standard MSA Varnishes and Acrylic Glazing Liquid cannot be used for architectural applications, including interior and exterior murals painted directly onto walls and ceilings.
Quart containers of our standard MSA Varnish and Acrylic Glazing Liquid are allowed and can be used. The rate of coverage for these products is approximately 75-150 sq. ft. per quart, depending on the type of substrate and method of application.
Trending Nature wallpaper needed to thin standard MSA Varnishes might be limited or prohibited by similar VOC requirements.
Always check local and state VOC regulations as these may include additional restrictions.
Special VOC - Compliant MSA Varnish and Solvent
The following products are VOC compliant and can be used for murals painted directly onto exterior and interior walls, ceilings,and other architectural surfaces . Please Note: They are NOT available through retailers. These are custom products and MUST be ordered directly from Golden. Please call Customer Service at 800-959-6543 / 607-847-6154 for pricing and availability.

MSA Varnish - Mural Formula (Semi-Gloss), Product #: CPWMV01
GOLDEN has formulated this to be VOC compliant in the Graphic Coatings category, < 500 g/l, and applicable for interior and exterior murals. The standard MSA Varnish products are not VOC compliant and therefore are not recommended for such applications.

This varnish cannot be thinned with standard paint thinners, as they increase VOC beyond limit, and should only be thinned using the CPWMV02 MSA Mural Formula Solvent to maintain VOC compliance.

MSA Solvent - Mural Formula, Product # CPWMV02
This solvent is VOC exempt and is used to thin the CPWMV01 MSA Varnish - Mural Formula (Semi-Gloss) for application and while maintaining VOC compliance. Typical additions are 1 part by volume of MSA Mural Formula Solvent to 2-3 parts MSA Varnish - Mural Formula (Semi-Gloss) to thin varnish to proper application viscosity.

Murals Painted onto Canvas, Panel, and Other Supports
Currently there are no restrictions for murals completely painted and varnished on an independent support which is then mounted onto an architectural surface.
Call or email Technical Support for additional information or assistance.

A final topcoat gives the mural more durability from the environmental factors.
The mural artist has a few choices on how to provide additional protection to the finished mural. One option is to apply an artist-quality varnish that is removable with various solvents, allowing for graffiti removal and general maintenance. GOLDEN MSA Varnish w/ UVLS is such a product, and more complete application information is provided below.

Another choice for protecting the mural is to use some of the various graffiti-resistant finishes that are commercially available. These range from protective wax coatings that are removed with hot water to the 2-component, solvent-based polyurethane coatings. They tend to have excellent chemical resistance, so that graffiti can be fairly easily stripped off without harming the coating. They also have excellent weatherability, and thus require less maintenance than some of the other choices. As we have not thoroughly evaluated these systems, we suggest you get all the information required from the manufacturers, and/or any mural groups that may share previous experiences, to determine the best choice for your specific application.

Application recommendations for GOLDEN MSA Varnish w/UVLS
We recommend a 2-step system, the first being a permanent isolation coat, followed by GOLDEN MSA Varnish, a removable varnish. The function of the isolation coat is to physically isolate the paint from the removable varnish (which makes varnish removal much easier and safer to the paint surface). An isolation coat also develops a thicker layer of acrylic, which will give better protection and durability and serves to unify the acrylic paint layer.

Isolation Coat Application
Choice of isolation coat should depend upon the artist"s application method. Another consideration is the surface texture, as brush-applying the isolation coat and varnish over a highly textured surface can generate foam in the isolation coat. For spray application, we recommend a 2:1 mixture of GAC-500 to Transparent Airbrush Extender. For brush application, we recommend a 2:1 mixture of Soft Gel Gloss to water.

Varnish Application
IMPORTANT: If applying the varnish to a mural painted directly on a wall, ceiling, or similar surface, read the earlier section on Murals and Architectural Applications

After the isolation coat is applied and has thoroughly dried (1-2 days, but no more than 1 week for maximum performance), GOLDEN Mineral Spirit Acrylic (MSA) Varnish can be applied. The MSA Varnish w/ UVLS is an excellent choice as a protective finish. This product provides a tough, durable surface that increases resistance to moisture and pollutants. The UV stabilizing system will serve to reduce the destructive potential of ultraviolet radiation from the sun, thus enhancing the life of the system. This varnish is removable in mineral spirits, turpentine and various aromatic solvents, which is a useful property for either graffiti removal or maintenance purposes. Spray application is recommended (1-3 coats). *
Note: Breathability is important to the successful adhesion of acrylic products. If a mural encompasses an entire wall made of a masonry product, it is advisable to apply thin coats of MSA Varnish. 3D Buddha Wallpaper will allow interior condensation and evaporating solvents and out-gassings to escape (some artists recommend leaving an uncoated breathing space near the edge of the mural as well). If this is not done, it may lead to premature adhesion failure between the coatings and the surface.

GOLDEN only recommends its MSA Varnishes for exterior work, NOT the Polymer Varnish. Polymer Varnish does not have the same exterior durability as the MSA.


ENVIRONMENTAL FACTORSTemperature, precipitation, and humidity should be considered during application.

Temperature
Ideally, the temperature during application should be between 65°F and 75°F. Higher temperatures can affect application, especially the evenness of the paint films, as they will dry much more quickly. Colder temperatures can harm the film formation of practically all of the coatings, and the absolute minimum temperature is 50°F. Caution should be taken at temperatures approaching this threshold.
Precipitation, Humidity and Moisture
Avoid painting in adverse weather conditions, such as rain and fog. Meditating Buddha Wallpaper of moisture can effect the drying times and will re-introduce water back into recently dried paint films. It is especially important to allow proper drying/curing time between the isolation coat and the varnish layer. Modern Home Wall Decoration can severely hinder adhesion, and can cause clouding of a clear layer. It should also be noted that sufficient drying time should be allowed between washing the surface and the initial primer or conditioner coats. Architectural coating manufacturers recommend waiting 30 days after washing concrete and cinder-block surfaces under normal drying conditions.
High humidity can also effect the mural"s drying times similar to the conditions cited above for precipitation. As India Wallpaper Wall Mural above 70%, more caution needs to be taken.

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