Decided that the air vents were looking a bit dull and needed sprucing up, not wanting stick on shiny bits I decided to spray the offending items, I wont bore you with how to remove them from the car that's fairly straight forward but taking them apart to spray was slightly trickier. The center vent is quite straightforward, release the clips along the top and the two guides at the side and the front then unclips
Remember the internal grill position for later reassembly, I took them out and gave them a scrub!
The side vents are need a bit more gentle persuasion, insert a blunt flat screwdriver or similar (I used a bike tyer leaver)into the sides while applying pressure from the rear, watch out for the spring washer when it comes out! best to do the side closest to the controle first as this is a large "clip" the other side is just a pin.
The air control wheel will now clip forwards and out, allowing the removal of the wheel so no masking! out to the garden with the spray can!
rebuilding is a straight reverse process
note my mistakes though! The two side grill inserts look identical, they are NOT!! ensure the one with a small L goes in the L/H side or you end up with restricted movement!When inserting the air control wheel unit make sure the flap is closed at the rear of the body and you set the wheel to the closed position when clipping back in, it will work first time that way!
Refit to car and admire your handy work
Before
And after
Not to everyone's taste I know but is is a bit brighter!