Nowadays, new acrylic products can include anti-scratch surface coatings that prevent damage to these pieces of art.
Andreas Gursky mounted "99 Cent II Diptychon", the most expensive photograph ever, on acrylic glass, probably with the Diasec process.
[1] Diasec panels are backed with aluminum or dibond, reinforcing the rigidity of the finished picture and sealing the artwork from both sides.
[3] Diasec samples that were made in the 1970s show a negligible color shift, the whites are still pure and there is no evidence of acid erosion visible.
[4] In the past, the process was patented by the Swiss company Alrane Inventing AG to generate a brand name for the official licensee.