I would get a bottle of touch up paint at Nissan, or a parts store if
they can perfectly match your color, and fill in the scratches with
that. It comes in a little nail polish like bottle, with a built in
brush.

I would not put grease or wax over it, that would just make things
worse.

Never heard of lithium in rust protection...

Patchin with paint may work for few years, then rust is going to peek out
one day, waxing 4x per year has a preventing effect.

Oily metal never rusts; ultralight airframes are not allowed abs none
hidden rust, so they fill/empty the structure tubings with oil. Oil is
nasty if one may touch/stain oneself... I have ancient vw van which
typically have rusty vertical seams: waxing the rusty spots on that paint
area, lettin oil run down into the sidewall element seams (in&outside) has
stopped any continuity... Those seams looks great if one doesnt put nose
into it(who would do that?). So if u postpone repairs, wiping the spots
with oily rag and/or waxing keeps rust off until u do smtg better.  Once a
month, depending on vehicle usage.

If/as/when the coatings/paint inside has been damaged, oily spray will
ACTIVELY keep moist from rusting the surfaces, also it actively displaces
water out from element seams where paint bends/cracks continuously while
car is driven. Stciky rust preventing sprays will cover water droplets
contained in any ambient air, and that may destroy a car door in 1 yr, I
have very bad experience with a stanza...

One product link
http://www.ruststop.ca/rust_stop_products_corrosion_control.htm