Edit scratch

Hello all, our car unfortunately got two long and relatively strong scratches. I was already with some workshops and painters and they say repaint. But the car is 12 years old and I don’t want to invest 500-1000 EUR, before the risk of getting new scratches at any time. So my question in which order would you proceed to protect them against rust and visually conceal them? Again so that there are no discussions: I don’t expect any more scratches. önes Ergebnis, I just want to do something for myself for a few EUR and this technically useful. I have here: Lackstift Wagenfarbe Lackstift Clear varnish Silicone remover Spray 3000er Schleifpapier Diverse gloss polishes and anti-scratzer polishes Most of the time you read that you should start with sanding, but I find that illogical, then you close everything yes and take the chance to fill up the car paint in the bottom layer? Thank you