Easy Ding Solution?

[AndrewJG]

Imagine you take a flat head screwdriver and stab your car bonnet. This is what I have.
I know to fix this good and proper is a total stripping and respray.
BUT. I'm not dealing with that. No sanding, no spraying.
Is there actually any way I can fill this in to stop further corrosion?
Not even fussed about paint. Just a filling and protective layer of some kind.

I dab it with WD-40 on a cotton bud when I wash the car. So rust is only very slight.
But inevitably it's going to spread under the paint.

Am I hoping for the impossible?
Is there actually a cost effective, quick and easy way to sort this?

I've had clear nail varnish suggested.?

[Buff Mchugelarge]

Firstly, get some rust killer on it, then a touch up and touch it up. Let it dry and touch it up again.
Essentially you want to fill the hole with paint. Once it's sticking up above the surrounding paint polish it level (t cut or a light compound/ scratch remover will do) and job done, a bit of patience and it'll be barely noticeable.

[ch427]

Just clean it up well and prime and paint it with a very small artist style brush, apply very little paint each time and build it up slowly. Id leave the rust converters alone as i find them useless, as long as its scraped back to bare metal you will be ok.

[paintman]

Get a touch-up kit.
Don't use the primer.
Don't use the 3" paint brush that comes with the kit.
Straighten out a paper clip (I also use a bit of fine MIG wire)
Use the paper clip to carefully put colour into the scratch until the colour looks OK.
Use the paper clip to carefully put lacquer into the scratch.
If you wish you can try filling with lacquer so its proud & then flat with fine wet&dry - 2000 grit - before polishing. There is a risk with that that if you go too far & go through the clearcoat on the rest of the paint it's game over & a panel paint so suggest be satisfied with sealing it & taking the eye off it.
I've had some success doing this using 2k clearcoat.