There are lots of ways.
Appreciate that even a 125 dragstar is probably over 20 years old and over 15 years makes it a Vintage.
1. Get rid of rust that is showing
– I use Redex and applied with fine steel wool. Let it soak a bit in the redex.
– for toucher spots use a razor blade or similar to scrape it off.
– Vinigar can also be used but needs to ideally soak in it for much longer.
2. Next use a cutting compound
– rubbing compound, t-cut, Brasso, Autosol (or all of them)
– polish out any other dirt snd scratches that remain as best you can
– this also helps remove the vinigar which as a mild acid.
3. Wax it
– Important to wax to cover any small holes with wax
– If this is not done the rust will be back a couple of weeks later.
– Some people also use ACF-50 (Google it)
4. Park it in a dry place
– If you dont have a garage put it inside your house 🙂
– If you have to leave it outside, just one cover should be enough.
– Be aware that a cover, in the wind, can damage and scratch.
– Ride it more often and then clean it more often.
– rinse it with cold fresh water after riding on salty or gritted roads.
– If you sorn it over winter, might be worth renting dry storage for bikes. (My mechanic offers this)
Hope this helps