A: Yes, they are. I have used only the finest archival and lightfast materials to create and frame them because I want them to last. Here are some instructions.
Always treat pastel paintings with the utmost care. Avoid bumping and other sorts of rough handling.
Pastel paintings should be kept face up at all times, especially when they are being transported long distances. Use an art shipper and ensure they are familiar with the requirement to ship the work flat and face up.
Never hang pastel paintings (or any art!) in direct sunlght! Sunlight makes colors fade over time. Also, moisture droplets can form on the inside of the Plexiglas. When they dry, it leaves marks.
Use a soft cloth and Plexiglas cleaner to dust off the glazing. Never use Windex on Plexiglas.
If you have questions, please contact me at firstname.lastname@example.org.
Comments are welcome!