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This was recieved from
Richard of Cambridge:
When cleaning underseal
off the subframes (and other body areas), rather than
using the labourious method of thinners etc. or the
dangerous method of heating it up and scraping it, it
is much better to do this:
1) place the subframe on paper
2) get a hammer and some strong flat screwdrivers
3) find a large lump or corner of underseal and place
the srewdriver at a shallow angle to the underseal.
4) give the end of the screwdriver a short sharp hit.
This should bring the
underseal off in chunks leaving the paintwork below,
or in my case it did. Providing that sensible safety
precautions are taken this is very easy and safe.
And this is a follow up
from Simon Dummett in Leeds:
Richard's method works
equally well for removing the bitumen soundproofing
stuff inside the car prior to welding (something many
people forget - it stinks and ignites quite easily with
spot heat...).
Use differing widths of screwdriver head for more difficult
areas, narrower heads for the inside edges of the floor
ribs and wider ones for the rib tops and troughs, and
for the wide, flatter areas such as the footwells or
exhaust tunnel, a thin chisel is best.
And another follow up from
Carl Houseman in King's Lynn:
Richard's method works
a treat as I tried this today and it comes off really
well and easily... If you have tar deposits anywhere
on the car, a little spot of diesel works wonders also.
The Highways Agency actually use red diesel to clean
all their tools of road tar.
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