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I am in the process of a body off restoration.I stripped the original
underseal and paint to bare metal. At this stage the underneath has been
repainted in POR 15, a very hard paint and looks great. I am concerned that
should I use underseal right through that in the long term it tends to
crack,hold water and facilitate rust.I am considering only using underseal
inside the guards/wheelarches. Is this a realistic option? Would there be
too much road noise? Comments please. Also, any suggestions on what type of
underseal?. J. Brown, XK 140 FHC

Hello, ref your question on underseal. I followed a similar procedure to
you with a MK2 restoration and stripped the underside down to bare metal.I
applied primer and about 5 coats of paint in body colour with no
undersdeal. The underneath looked superb. After about 3 years though and
only very light summer use of the car I noticed that due to the harsh
Scottish climate the paint has started to crack with exposure to the air
and some possible flexing of the body. I think that I should have applied
an underseal to stop this at the time. I am thinking of doing this in the
summer. In the UK, the market leading products are sold by a company called
Finnigans. They sell "Waxoyl" a wax based product for applying to interior
cavities and now also a black Waxoyl for underbody application. I have
applied this to some metal outside my house and water tends to just drip
off. I will probably use this as I think it is the best. I would like them
to bring out one in body colour but perhaps this is asking too much.
Contact details of Finnigans could be provided if required. - Cheers, Dave

No useful suggestions, but I'm pleased to find someone else with my
closeted conviction that undercoating helps for five years then hurts for
five...leaving zero sum for ten years.
Jim Warren XK 140 dhc, XJ6

I used a "STONE CHIP" which is a waterbased paint product. It can be
applied manually with a brush or with a special spray gun. Provided the
metal is prepared properly the adhesion is good. It gives a stipple finish
which can then be painted body colour. It also acts as a sound inslator. I
put it on the total underside of the car as well as inside on all areas
covered by moquette and
carpets. It is made by a number of the major paint companies. Hope this
helps. - Peter Fielding

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