Addressing these needs, this study describes the modification of low-cost polymers made from elemental sulfur and either cyclopentadiene or dicyclopentadiene using low power continuous wave lasers with wavelengths of 532, 638, 690, and 786 nm. Polymers made from elemental sulfur have received increasing attention with the advent of inverse vulcanization and related polymerization methods that convert this abundant and inexpensive feedstock into functional polysulfide materials. The high sulfur content of these intriguing polymers imparts a variety of chemical, physical, and optical properties that enable diverse applications in energy storage, thermal imaging optics, and metal binding. Additionally, the S-S bonds in these polymers can be broken and reformed, which enables repair and recycling. It is the lability of the S-S bonds in these sulfur copolymers that led to the discoveries detailed in this report. Specifically, it was found that the surface of a copolymer made from sulfur and cyclopentadiene was visibly altered after an exposure of less than 1 second to a 690 nm, 1.10 mW diode laser. Given the low power of the laser and brief exposure times, this rapid polymer modification was a surprise. Here, we disclose this phenomenon for the first time and investigate it in detail for a range of laser systems. The direct modification for a related polymer made from sulfur and dicyclopentadiene was also studied. The objective was to understand and control this process and use it for precision polymer modification. Methods are described for temporally-and spatially-controlled swelling or ablation of the polymer surfaces, as well as efforts to thermally erase these modifications. These insights enabled a variety of novel applications for this class of polymers including rapid and programmable lithography and erasable information storage.