Quote:
Originally Posted by MP&C
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Wow thank you so much, this part was solid gold:
"Since metal bumping and finishing are simply a matter of hammering, it should be learned at the outset how to use the hammer and dolly.
The simple secret is to make every blow of the hammer strike the metal directly above the dolly or spoon.
The down stroke of the hammer drives the high spot down onto the face of the dolly block, smoothing the metal. The dolly block absorbs the shock of the hammer blow and prevents the damaged metal from being driven down too far.
At the same moment, the dolly block bounces away from the under surface of the damaged metal and quickly rebounds against the low spots, raising them before the next stroke of the hammer. With free whipping blows of the hammer on the outside surface of the metal, the two hand tools rapidly smooth the rough spot.
Never grip the dolly tightly or apply any great amount of pressure on it, because the important automatic bounce and rebound of the dolly will be lost. Most repairmen naturally develop a rhythm of 60 to 150 successive hammer blows per minute as they become skillful. Bumping is only a matter of hammering the high spots down and bringing the low spots up until the damaged metal is again even in contour.
Putting the high metal down first is very important."