I’ve ordered a couple dry-erase magnetic sheet items, and both times, dry erase markers (various brands and colors) have been impossible to fully erase, and left smudges of the color wherever I wrote.
However I did also try wet-erase markers, and those seemed to work better without leaving much of a trace after erased.
I may suggest looking into this and perhaps changing the name/description of them. The item I ordered was on this template: https://www.zazzle.com/pd/spp/pt-gotchacovered_magneticsheet?size=85x11 but 11x17 size.
Or is this just me? LOL