Would the best option be real masking fluid? (I had no idea such a thing existed till you posted tbh)
Apply wih a brush, paint over and then peel it off?
A 5 min search online shows it's mainly used in watercoloring, hmmm. Any clue if it would work on metal?
I have experience with masking fluid on watercolours. I think it will stick to steel just fine. It feels a lot like tubeless tyre sealant actually and dries up to a rubbery film that you can roll or peel of afterwards.
Would the best option be real masking fluid? (I had no idea such a thing existed till you posted tbh)
Apply wih a brush, paint over and then peel it off?
A 5 min search online shows it's mainly used in watercoloring, hmmm. Any clue if it would work on metal?