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Terry Moody writes:

Insulation Foam Used To Make A Sanding Mold;

1. Use 2" masking tape to seal area to be used to
make a positive mold, make sure to use fingernail to
press tape so as to get crisp lines in profile edges.

2. Place wax paper where you do not want foam to adhere.

3. Tape down wax paper and leave area to trim later
with razor blade to final shape.

4. Picture of insulation foam. Have a cut piece of coat
hanger and Acetone to clean tube attached to can after use.

5. Final view of taped off area.

6. Do not press trigger of can down all the way or
foam will come out to strong. Depress half way and
create about half inch ribbon height.

7. Make mold long enough to cut after drying into 2- 3
smaller molds and you can use each piece for different
grits of sand paper. This is Conversion Varnish so I`m
going 80, 100 then 120. Make fist and pound on
surrounding areas so as to level foam and take out bubbles.

8. Leave original tape or place new piece of 2"
masking tape into mold after it expands about 50% and
dries (4-8 hours.) If weight of backing on sand paper is
thick you may have to use new razor blade to cut and
shape interior of mold and use PSA sanding paper to
adhere to final shape (I`m using Klingspoor). Trim
exterior of mold as needed.

As in past posts my explanations have been noted as
convoluted, hope this is clear. Saw a picture of this
in a book but had to experiment several times to get
nuances. "Try & Fail, Try & Fail, Try and SUCCEED !

Terry/Delaware


















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