Getting a dent out of a hardshell suitcase—typically made of polycarbonate or ABS plastic—is often surprisingly straightforward using heat. Because these materials have a "memory," they want to return to their original shape when warmed. The most common DIY method involves using a handheld hair dryer or a heat gun on a low setting. You should apply heat evenly to the dented area for several minutes until the plastic becomes slightly pliable. Once it's warm, you can often reach inside the suitcase and firmly push the dent back out with your hand (wearing a glove is recommended to avoid burns). For deeper or more stubborn dents, some travelers use the "boiling water" method, carefully pouring hot water over the dent to soften the casing before popping it back into place. If the suitcase is made of aluminum, like a Rimowa, the process is different; since metal doesn't have a "memory" like plastic, dents usually have to be gently hammered out using a rubber mallet and a flat wooden block to avoid scratching the finish.