How was the Hulk’s special effects makeup achieved?

The first thing I want to mention is Iron Man. In the play, Iron Man’s inner core glows to provide power. Many people may think that it is done by computer special effects. In fact, it is done layer by layer by the special effects makeup staff. It was completed by attaching the fake silicone skin to the hollow center of Downey's chest and inserting a pre-made inner core. And because of the layers of silicone skin, Downey complained that it was itchy during the makeup process. Next is the Hulk’s special effects makeup. As we all know, the Hulk's entire body is huge and his body color is green. However, it is difficult for ordinary human beings to be as tall and strong as the Hulk, which makes the secrets hidden in the clothes he wears. The actor's physical condition coupled with the bulky costume being held together with adhesive can be imagined.