Corrosion on Injection lines

[gardenshed]

I've noticed some surface corrosion on the fuel injection lines on my engine. Easily cleaned off with emery paper. what paint or other protection is recommended to delay it happening again?

 

[Bilgediver]

I've noticed some surface corrosion on the fuel injection lines on my engine. Easily cleaned off with emery paper. what paint or other protection is recommended to delay it happening again?

Greasy fingers or Hammerite! If exceedingly flush then Volvo green