He is asking about lubricating hinges, which i assume are stainless.
I see what you mean!
I assumed it was about the seat cushion hinges like those:
Which I think are just painted.
But I use 303 Aerospace Protectant on both, SS hinges (like in the head compartment) and the seat cushions. The 303 leaves a nice sheen of lubricating agents, I think it's mostly silicone, but their formulation is just the best.
I have also been using it on the hull, once a year, there is a special way of doing it - saturate, let dry, buff, repeat. It does not provide the same cosmetic results as waxing and polishing, but the 303 penetrates gelcoat and vinyl (like the partial hull wrap/stickers covering the sides of the hull) better than almost anything, without harm.
303 is not a "lubricant" in a classical petroleum distillates sense but it penetrates and lubricates better than most similar silicone products. Without the terrible side effects like cracking of seals and rubber with Armor-All.
I would recommend 303 wholeheartedly for everything inside the boat. I also do the windshield with it - to saturate the seals. It is a bit of a pain to get it off the glass (with windex or similar) afterwards but worth it as the rubber seals saturated with 303 do not dry/rot/crack and will last forever.
The big issue with the 303 AP is NOT to use it on canvas. It's okay on new canvas but it has an uncanny propensity of speeding up (rapid) disintegration of older canvas. Such as bimini tops and boat covers. Some light overspray is probably okay and harmless, but using it to saturate those older canvas, as you would with a canvas protectant, leads to those falling apart. Weird.
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