Testors Indy Style Car

Tried the search feature, however I did not find an answer or possibly I did a poor job at searching.

I have limited information about blow mold injection process of plastic models. Although I would presume that the entire color process would be throughout the plastic piece. In other words, as one would cut through the finished product, the cut would reveal the same color on the inside as on the outside.

My knowledge is also limited pertaining to the history of Testor's .049 powered Indy Racer. I've seen the Testors as a white .049 Sprite model. I've never seen it in any other color. Yes, I've seen the yellow .049 Wen Mac Lotus.

My question revolves around if the Testors' Indy vehicle was available in red as a blow molded vehicle? The following images reveal a concern if this available item is in actuality a red painted vehicle hiding it's original white blow molded body. As one studies the images, it appears that the inside still has evidence of white. My guess is this model has been painted red.

1) Is this an original white model painted red?

2) Were there any other colors of this Testors' vehicle other than white?

Thank you in advance for all responses.