I use a CA glue a lot in my woodshop. It has many applications with so much of my things I use. It's perfect for use on 3d printed parts. When doing a model, sometimes I make models and split them in half to save from printing. Ca glue is perfect for this application as it only takes several seconds to fully dry. Even faster with the accelerant! It's also perfect for laser projects. One of the things you'll inevitably make is a name sign or door hanger. This usually requires cutting a shape like a circle as the backer, then cutting some cursive letters. Starbond is the glue I use to adhere the letters to the backer. It has no problem gluing to painted surfaces.
The last, and probobly most used case for CA glue in my shop is on my CNC machine. It's something called the 'blue tape method'. Basically, the idea is to put on piece of painters tape on the underside of the material you're going to cut, and another onto the wasteboard. Then, put some ca glue between the two pieces of tape, a ca glue sandwich if you will, to create a perfectly heled piece that will will stay put during carving and be easily removable when it's finished. It also means there's not clamps or bolts that can be in the way of the endmill.
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