How to remove rust from water jacket? any chemicals?

[ParticleX]

Tried suka, pretty effective. Pinaghalo ko pa Datu Puti saka Silver Swan, no kidding

I ran it for a few kilometers. Nung hose method lang eh clear na ang tumutulo, pero nung na-drain ko na yung suka eh light brown water ang lumabas. Sa next radiator drain ko eh pure suka na lang talaga ang ilalagay ko for a a week para effective talaga

Madami din sa google swear by citric acid and oxalic acid