"geoff" wrote in message
...
In message , news.virgin.net
writes
Hi,
I fixed up some pending structural rust on my bike with hammerite red
undercoat but don't really feel the need to colour match the bit I did
(underneath). Can I just leave the undercoat exposed ? will this do the
job
? I'm always seeing cars driving about will only undercoat.

Hammerite undercoat, I don't know, but I thought that normal undercoats
absorbed water

Primers stick to surfaces but don't cover and have no surface themselves,
either flat or protective
Undercoats stick to primers, cover, and have surfaces that are flat but not
protective
Top coats stick to undercoats, don't cover, are only as flat as the surface
underneath but have a protective surface.

Combination paints (eg primer/undercoats, "one coat" for decorating) muddy
the water, but the above is close enough!


--
Bob Mannix
(anti-spam is as easy as 1-2-3 - not)

--
geoff