If you are using a bright colour then you
should start with you walls being white or grey. A bright yellow
over lets say a dark blue will never cover, there are some
colours that need a pure white base and I mean a pure white
base, it may mean that you will need to paint over the existing
colour a few times with white to achieve this. There is
away that may help you work out what colours may need a white
base coat and that is from what base they are made from (all
paints colours are made from different standard base colours),
bright or light colours made from any other base than white may
need a white base coat. An example of this would be a yellow
tinted from a white base, now it should cover ok but if you have
a yellow made from a deep base then your in trouble, you will
need a white base before you apply the top coats. Consult your
paint shop but make sure they know what they are talking about
as I have met a few over the years that don't really know much
about paints. I personally made a mistake recently, it
was a bright red and I used a grey undercoat and I should have
used white undercoat. I was curious what the manufacture said
about this colour and if there was any specific colour I should
use for an undercoat. Their reply , remember this is the
manufacture, there was no specific undercoat colour required and
that a white or light grey undercoat would be fine. I can tell
you my undercoat was a little darker then light grey but I'm
sure pure white is the only undercoat that should be used with
this red. Why I didn't use white to start with is because the
owner of the house had used the colour on a few doors themselves
with a white undercoat, looking at it you could see the white
through the red. After I had made my mistake I took another look
and come to the conclusion they had just put the paint on too
thin and that was why the white was still visible in some area's |