painting slightly rust steel tube

on a kitchen unit in front of a hob (not space for original rail).

there is some minor pitted surface rust remaining (which seems to look black rather than orange).

Converting the slight surface rust would be nice, but the stuff to do that can be expensive.

would be nice if it ended up white, or next best, black.

Something like this likely to be any good, then just paint with white hammerite ?

erting the slight surface rust would be nice, but the stuff to do that can = be expensive.

Chemical rust converter. Use strong phosphoric acid, which I buy most cheaply from a cannabis-growing hydroponics shop. Improved versions of this are either gelled with cellulose, or improved by the addition of tannates (the opaque white liquids). However plain glacial phosphoric is pretty good on rust.

Then paint.

In message , sm_jamieson wrote

Google phosphoric acid rust converter

the slight surface rust would be nice, but the stuff to do that can be expensive.

Paint it with 30% phosphoric acid, let dry, rinse off, paint with primer, topcoat. I did a rusty trailer chassis last year with that, and there's not a trace of rust coming back so far, yet it's been outside in the weather all that time.

Converting the slight surface rust would be nice, but the stuff to do that can be expensive.

And that, m'lud, is the case for the defence....

the slight surface rust would be nice, but the stuff to do that can be expensive.