When beating with a hammer from above the underlay rion, the hand-held underlay iron
should be placed against the back of the metal panels, and then beat the convex part. The beating of
hand hammer can make the metal panel contract and finally smooth the metal panel.
② Beat with a hand hammer from other parts than from directly above the underlay iron.
The underlay iron is placed against the lowest part of the dent, and then the higher parts near the
dent are beaten with a hand hammer.
Generally, when trying to repair the dent with a hand hammer and an underlay iron, the convex
side is beaten with the hand hammer and the concave side is pressed against the underlay iron. First
do brief correction by beating the damaged part with a wooden hammer, and then do finer repairing
with an iron hammer. For a larger area of dent, the underlay iron should be placed against the place
where the dent is shallower, and the hand hammer should beat the higher parts. Besides, the wooden
hammer and the iron one should be used alternatively according to the actual situation.
(2) Repair the dent with a shaping spoon or tommy bar. Shaping spoons and tommy bars are
commonly used tools for door panel maintenance, and they are customized according the
characteristics of the vehicle body. They can reach the limited space between door panels to push up
the dent. This method is suitable for the narrow room between the door panels where it is
inaccessible for the underlay iron or the hammer, and the shaping spoon can act as a underlay iron
to distribute the impact of the hammer over a larger area.
(3) Restore the dent with a dent smoother. The dent smoother is applied to the inner side of the
metal panel and it is used for the dents that are hardly accessible to other tools and it is usually
operated in the following two ways:
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