Hi I have tried the Molotow chrome pens. The fibre tip is ok for large areas but very difficult to use on small parts and if I remember it did not take well to a varnish finish more info later in the week.
Stan.
I have used the Molotow Chrome paint pens too.
One job I did, was to re-chrome a pair of indicator/sidelight reflectors on front my 1964 Saab two stroke.
Both reflectors had completely lost pretty much all of the silver and were back to the plastic casting.
Initially I wasn't sure whether it would work and if it would produce enough of a shiny/reflective surface, but 2yrs on and they're still good with no tarnishing.
So, I can recommend these for certain jobs. The secret seemed to be, not going back over where you have already applied a covering of paint already and just passing back and fore, alongside the previous line each time.
Will