Motorcycle saddlery

Hello

I have a whole motorcycle saddlery (driver and passenger seat, saddlebags) that I want to redo.

The original light brown colour became greenish-yellow with exposure to sun and rain.

I would like to paint it all back in dark brown. I have two questions:

- do you recommend the "boats" range for a better weather resistance?

- do I first have to "catch up" with the original shade and then apply a darker layer or is it possible to make the final shade directly without having any colour differences in the end?

Sincerely,