Primer

Hi: I need to know if I can use Krylon Sandable Gray Primer #1318 for building car and airplane models? I went to the Krylon website and that was not helpful, so I called the 800# on the Krylon can and spoke to a customer service person who appeared not to be as informed as he should have been. I asked him if I could use it for this purpose and he put me on hold so he could read the product info. When he came back he said he "thought" it could not be used for plastic and suggested their Fusion product. I then told him that the can itself says it can be used on plastic and I just wanted to know if it could be used on model plastic, but he was less sure than I. Can I safely use it for model type plastic? Thanks all.