Techniques for Cleaning Acrylic Paintings
As with any surface around the home, office, or especially, in a public place, paintings become a depository for airborne dust. They can also get touched occasionally, either inadvertently or purposefully, and may become dirty as a result of frequent touching.
Cleaning of paintings by professionals in fine art conservation is the best approach to maximize longevity. They employ a tiered approach to cleaning that starts with the least intervention possible and progressively becomes more aggressive as needed. However you can do your part to keep your artwork from becoming damaged due to dirt and grime.
Vacuum or mop these areas, rather than sweeping, to minimize airborne dusts.
Minimize exposure of acrylics to elevated temperature, especially in combination with dusty or humid conditions. Such areas may be near hot air inlets, in direct sunlight or attics.
Minimize frequency of direct contact, such as dusting of unprotected acrylic surfaces. Instead, use compressed air.
Seek out professional services as appropriate for the piece and conditions. By virtue of training, experience, tools and techniques, the risk of damage to the painting will be much less if it is cleaned by a reputable professional in the field of fine art conservation.