What makes a crease different
A round dent is stretched evenly. A crease concentrates the stretch along a line, which means the metal must be moved in a precise sequence — work it in the wrong order and the panel oil-cans or the crease sets permanently.
Bodyline dents are similar: the factory character line has to be rebuilt, not just flattened.
Can every crease be saved?
Most can, as long as the paint is intact. The exceptions are creases where the metal is torn, the paint is cracked through to primer, or the dent sits on a panel edge with no tool access.
When a panel genuinely cannot be repaired paintlessly, we will tell you straight and quote the conventional alternative — no filler surprises after you drop off.