Prepare Surface and Test Large Suction Cup on Practice Dent

What happens here

Before working on the main truck, the presenter cleans a similar dent on a 'Silver Dodge' truck. He sprays glass cleaner onto the dented area and wipes it clean with a rag. The truck has been left in the sun, warming the metal, which can help in dent removal. He then demonstrates using a Pittsburgh 4-1/2" diameter suction cup by pressing it firmly against the dent, clamping down the handle to create a tight seal, and then pulling firmly to try and remove the dent. He observes that the suction cup pulls out part of the dent but struggles to fully remove creases.

Goal: Clean the area and test the large suction cup on a practice dent