I like stencils. The detail you can get from these stencils is great!

You can use them on anything! I was really impressed with the results for the T-shirts. I dare you to try them out. This stencil was a hit at a volunteer event I attended. 

You can resize the stencil to your desired size while keeping a 2mm thickness. You can also use a hairdryer to heat and mould the stencil around objects. Any filament. 

It's convenient to use vapour barrier material to create a shield for overspray.