I have a new watch with a steel wristband (or strap).
I had a few similar ones in the past. From that experience, the strap gets dirty and is very difficult to clean due to its complicated shape with crevices between the links. But worse, when exercising, the metal reacts with sweat (oxidises or something), leaving black residue on the wrist. I want to prevent this.
For reasons I'm not getting into, I don't want to replace the strap with a silicone one or something else naturally inert. Instead, I'm thinking of spraying or otherwise applying a thin protective layer to the inner surface, such as rubber, silicone or some such.
So far, I've tried (on a piece of old one):
- PVA glue. When dried, it leaves a nearly perfect transparent film. Unfortunately, it is not waterproof: it clouds and wrinkles when exposed to water. It can be dried again, but it will likely peel off before it does from the constant skin contact.
- Some masking liquids (used for model painting). They leave a more rubber-like layer, but, of course, peel off too easily (by design). Most of them are also even less water-resistant and all are coloured (which I almost don't mind, but transparent is preferable).
I also have some silicone, but it is too thick to be applied evenly.
It's easy enough to apply a sticky tape of some sort, but even the best one won't conform to the surface of this complexity, and dirt will happily get under it.
Any other ideas?