Also, Nirdesha, go to any one of your product pages and click on a format choice. For instance,
I went to your 'Kitten Scaring the Birds' -
http://fineartamerica.com/featured/kitten-scaring-the-birds-nirdesha-munasinghe.html
then from the choices on the right side of the page, clicked 'Acrylic Print' from the upper right-hand corner, which took me here -
http://fineartamerica.com/products/kitten-scaring-the-birds-nirdesha-munasinghe-acrylic-print.html
On that page, scroll down below the image, sizes, and price, and further down -- below 'Additional Products' -- you'll find this information -
About Acrylic Prints
In that section, you'll learn all about acrylic prints. You'll find the same on every type of product page, whether on Pixels or FAA. :-)
(Scroll down a little further, and you'll find more info -- About You!)