Posted by: @deeepbrain

I watched Scotty Video... years ago and he said One can get touch up paint from amazon...

I wonder if that the still the best solution for someone in Australia..?

 

Just paint over the slightly rust spots? do I need to sandpaper it and prime it?

If there's rust, you must sand it completely off, then prime and paint it. Otherwise, moisture will become trapped in the paint, along with rust, causing it to bubble up, and keep rusting from the inside. 

Posted by: @deeepbrain

Just paint over the slightly rust spots? do I need to sandpaper it and prime it?

Unless it's mere surface rust which can be addressed with a clay bar, you must address the rust before painting.

depends what you're trying to cover. Post photos of the spots

I bought a can of Promatic paint from a company here in the UK. Matched the car colour based on paint code, only about £20 for 500ml. Thought it was pretty good, but a bit leary about the base coat + clear coat technology stuff.

Still it seems ok for the past 3 months or so.

https://imgur.com/a/7uQxpPH

this is a different car but I ask about it here too.