Out of the box ways to clean rust?

[Neo]

Thanks for the reply, guys. It turns out that my IT skill is not as bad as I thought Here are the pictures. I just acquired this supposedly Segaluh blade in this condition couple months ago and the rust at kembang kacang was already there. The rest of the blade was pretty much okay with very little rust spots in certain parts.

So ... now that we have the image - hopefully it adequately shows the situation - do you guys think this kembang kacang is strong enough for rubbing with lemon or pineapple juice?

If the kembang kacang will survive another session of traditional cleaning, I am considering to have a professional do "the whole package" - from cleaning to re-staining with warangan. I don't know how to *correctly* perform traditional cleaning methods, so I prefer to just leave it to the expert if cleaning is the way to go.

Mr. Maisey, sorry for the basic question, but what is cold blue? Is it available in Indonesia - or, could you recommend another brand that is available here?