Well, I talked to the paint expert at the Auto parts store, and he said that this particular brand, 5-star X-treme 5185, does NOT require a flex agent, ,as the new formulas coming out on the market usually no longer need it. Some still do, but this particular one does not. It is perfect for plastic parts, bumpers etc. And after I told him what it was for, he chuckled and said, "You're not the first modeler to ask me this." Apparently, this shop is the place where most of the other local club members get their paint.

Patriot