There are many other paints out there that can be buffed(Humbroll, Gunze, etc.) among them the most recommended is Alclad II.
Than there are also the buffing powders, the more you buff it the more it will look like chrome.
Procedure is normally the same, paint part GLOSS black and apply product over it, wait some 30 minutes and start buffing.
If you want to redo the finish on the frame I would recommend to strip the plating of first, can be done by inserting it into kitchen bleach/acid.
As always test on a bit of sprue/runner first, as intensity of those products will vary.
Not sure what you mean with NON-buffing metalizers, I guess those are straight metallic paints like the Tamiya ones, metalizers usually need to be buffed or can be left as applied.
Metallic colours are best air-brushed onto the kit, depending on the kit & finish brushing metallic colours can produce a better effect.
Example:
A 20yr old Roadbike looks better brushed as the engine would have seen plenty of wear and tear( if not have been repainted already). On the RC211V and the FW24 this does NOT apply as the engine is overhauled after EVERY race.
Advise on metallic paints some will run if sealed or topcoated with an incompatible product. Humbroll Gold was famous for that.
As for recommending metallic paints there will be as many different recommendations as responses to this thread.