Edit: I made a Version 2 of the spraycan handle/trigger. I was not thinking of revising it when I put it up, so it's a bit of an after thought.
Someone was wanting a printable handle/trigger for spraycans on a facebook group. I only noticed one of these on thingiverse. I decided to give it a try and this is what I came up with. It prints in one piece and doesn't need support. It pressfits onto the spray cans.
The pros to it are that it's one piece with no hardware or supports needed. The cons are that not a machines handle tolerances the same, so it may not for some. This is why I am including a small test part as well. Print it before printing the full handle. If it fits you have a good chance of the full thing fitting. If it fails than you did not waste as much time or filament printing the full handle Other problems could simply include the joint fusing together. You can see a full video of it here https://www.youtube.com/watch?v=IxVCsVSmEsw
I only used 10% infill on this with 3 outer shells or perimeters. The handle has a built in gap to reduce filament cost.
Handle/trigger in action gif
I have a more detailed video linked above.
Original and Version 2 line up
I was not expecting to refine this at all. This was partly done based on others thoughts and on a personal thing I wanted to change.
The V2 ditches the large curve. This was done to improve the look of it without using supports. I don't care too much on looks for functional prints, but even I will admit that the curve would look a bit better with supports. Instead we go at the exact same angle that the handle runs. The only other difference is the angle of the trigger. I changed the angle to chop off some of the waste plastic that can be seen protruding through the top of the original while in use. These are the only changes I made to the V2.
These are rough measurements
I should of done this earlier, but I am doing it now. Below are the rough height measurements for the tips or nozzles on the spray cans I had on hand.
Red tips 11.08mm in height
White tip 13.80mm in height