That's a difficult question, but I'll try to answer the best I can.
After a bit of looking, spray paint would be the answer. At least a specific brand that can handle flexibility and movement. These kinds of paints can be found at general hardware stores like homedepot, lowes, or orchard supplies. So getting there, just ask for a spraypaint that is flexible and water resistant to which they can help you from there.
Hope this helped.
When in doubt, just take the next small step.
With that next step take a deep breath. It calms the mind.
When the mind is calm you realize the best is still yet to come.