Boiled Linseed oil to preserve patina?

[Ermot]

I've used Sweet Patina Sauce. I am guessing that boiled linseed oil is part of the ingredients. It works well and is not shiny after you rub off the extra.

https://sweetpatina.com/

[Willowrun]

I use Penetrol on dried out paint as needed. I gently clean with Griot's first then give a heavy coat of Penetrol. I just cleaned and lubed up this off-brand a couple days ago. I just try to preserve what is there and otherwise not mess with it. Best thing for old paint is to keep it out of the weather.
For the frames and undercarriage I use Boeshield T9.