Thanks for posting this. We've had a bunch of these rug/mat samples sitting here forever and never tried them until I saw your post. They are awesome! We're running them on a rotary press and besides the smell they print up beautifully although we need to back each one up with an extra spacer to retain the constant pressure or else the trailing edge prints a bit light. We also have some similar mats with a tufted pile type set up that we were going to use for custom yoga mats but they are probably too light for door mats. Might try them anyways.
I think we'll be having some made up for us overseas for sure. I think that Coastal has the smaller sizes with nitrile rubber backing for sale as that must be where we got our samples from.
Something cool we're doing, custom microfiber towels, awesome product although the buy in was really really steep as we're having our own fabric spun for us.
Tai