In article ,
Theo Markettos wrote:
Thanks, that's really useful. So you'd suggest separate coats of
penetrating light WD40 or Waxoyl, and then mixed Waxoyl+underseal? I
have areas of failing underseal (coming off in lumps) - is it worth
pulling this off (might be a bit like peeling an orange - get more than
you bargained for) or slapping penetrating stuff on it and then
underseal mix on top?

If underseal is peeling off, the rust will have got some way past the
edges of the loose bits. I remove the loose bits then some way round the
edges with a hot air gun. Then sand down to bright steel, apply a zinc
rich primer, then underseal.

Waxoyl is far from the best of those sort of things. Have a look at the
Dinitrol range.

--
*Never test the depth of the water with both feet.*

Dave Plowman London SW
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