Unfortunately the beloved Innsbruck has picked up a couple of dings in the last few months, both my own doing - the first when I let a bicycle handle rub a portion of paint from the roof whilst in transit and the second a deeper parking scratch / dent on the OS rear door when I failed to spot a bolt helpfully sticking out from a concrete pillar in a multi-story.

Looking around on here and also on eBay I am at a bit of a loss to work out what is best to improve the appearance. I will try and buff some of the scratches out with T-Cut or similar but I want to also fill in where the paint has been scraped away. The colour is 3L (Silver Stone).

There are various companies offering "touch up paint" some with integrated lacquer, some without; also there are the official Mazda products "touch up paint pen" and "touch up kit set"; some are offering aerosol sprays; and on here I've even seen someone advocating Humberol Enamel (non metallic) model paint No.11.

Can any of you give me a steer in terms of what is going to achieve the most cost effective and practical outcome? I don't need it to be perfect by any stretch, but I would like to cover the exposed metal without it looking like I've just dipped a paintbrush in a can of Dulux and slapped it on.

Thanks in advance to you all.