I have an old exterior spiral staircase in pretty rough condition.  I have 
given it a quick going over with a grinder and removed all the flaking rust, 
but do I need to remove all the rust completely before painting with red 
oxide undercoat?
Or would anyone recomend a rust converter instead of red oxide?  I intend to 
use a good water based top coat on it.
Thanks for any help
Stuart

Screwfix do an excellent rust converter which we used on cast iron gutter
after using a wire brush on a grinder. Then we put red oxide on, then two
coats of the topcoat. I highly recommend the rust converter. A little goes a
long way. Always pour some into a seperate container to use to avoid getting
rust in the pot.


http://www.screwfix.com/app/sfd/cat/pro.jsp?id=18770&ts=23992




"stuart"  wrote in message
news:defnvd$u7c$1@newsg3.svr.pol.co.uk...

> I have an old exterior spiral staircase in pretty rough condition.  I have
> given it a quick going over with a grinder and removed all the flaking
rust,
> but do I need to remove all the rust completely before painting with red
> oxide undercoat?
> Or would anyone recomend a rust converter instead of red oxide?  I intend
to
> use a good water based top coat on it.
> Thanks for any help
> Stuart
>
>