On 18 Aug, 14:43, peter wrote:
I need to refresh some old yellowed wall tile grout - are those paint
pens any good or am I stuck with raking it out and re-filling?
Thanks

Our new bathrooms at work have the grout coloured with a grout paint
from day one,
presumably to make it super-white, so it appears to work.
Whether its so good on old greasy grout I'm not so sure. They are
cheap so its
worth a try. Raking out is best, but its not a nice job, and hard not
to slip and damage
the tiles.
Simon.