Metalizers make the parts look like metal. Not plastic painted with silver paint, they look like metal. I've used a lot of the MM buffing metalizers and they are OK. They do tend to rub off if they aren't coated properly and when they are coated they tend to lose some of their sheen. Alclad tends to work better in my opinion.
Virtually all metalizers are laquers and should be treated as such. Thin with laquer thinner, clean up with laquer thinner, use ONLY with plenty of ventilation and, if possible, use a respirator.