idlemarvel
Neither idle nor a marvel

I'm not a frequent rattle can sprayer, but on a recent trip to Halfords to buy some rattle can primer and cream coloured paint, I saw this for sale. (I imagine experienced rattle can users have already found something similar.)

It just clips onto the top of the can, and pulling the trigger pushes down on the paint release button.
It makes the spraying process much easier, You have better control over direction and spray intensity, it's easier to hold and to make the side to side movements to get an even coverage,. Highly recommended. It cost about £7 from Halfords but it is probably available on Amazon or eBay cheaper.

It just clips onto the top of the can, and pulling the trigger pushes down on the paint release button.

It makes the spraying process much easier, You have better control over direction and spray intensity, it's easier to hold and to make the side to side movements to get an even coverage,. Highly recommended. It cost about £7 from Halfords but it is probably available on Amazon or eBay cheaper.