Self-cleaning dogs?

Last night the ever watchable Kevin McCloud was in architectural heaven over paint that literally shrugs off dirt. He was as gleeful as a six year old boy as he dipped and re-dipped a piece of board coated in this clever stuff, and no matter how many times he submerged it in a vat of liquid mud it came out sparkling whilst the non-coated back was thick with gloop.
Yesterday I was on my hands and knees; that's on HANDS AND KNEES, with damp J-cloth wiping Mopsa's muddy pawprints off the stairs, landing and bedroom floors.
The building work + the weather + the season = unavoidable heaps of mud. Unbelievably copious amounts of the stuff. You open the front door and it pushes into the house unasked and unwanted like an evil relative or a z-list celebrity contrarily selling Daz. Footprints and pawprints are swabbed off the kitchen floor weekly; more often would be pointless - you might as well do it every half hour and die of boredom and drudgery. At least that can be done with a mop, the floor being covered in lino. But the stairs, landing and bedrooms are all ancient floorboarding of varying widths - the mop is not for them. So, hands and knees it is then.
Mopsa watched Grand Designs with me last night. She cast a baleful eye of recognition at the vat of mud.
I sit up in bed this morning and see the trail of huge mucky pawprints polkadotting what had been the beautiful clean wooden floor. I cast Mopsa, who is sleeping on her soft mat by the bed, my own baleful glance, wondering if it would be possible to have her coated in Kevin's miracle paint.