Alternating red/grey primer --> Why?

[Kokanee]

Still starting out in model building, and I've noticed that a lot of makers use alternating coats of red and grey filler primer when finishing their models; why is that?


Thanks

 

[Mike J.]

To see any high & low spots otherwise invisible to the naked eye, I think. When sanded evenly, they'll show alternating colors – the lows unsanded and the highs showing extra sanding.

 

[autoprops713]

Lol.....or you run out of grey primer and then notice you have a red one laying around.

 

[Rogviler]

I've always preferred one color of primer, and then a light dusting of another color to use as a guide coat if I think there are low spots. No more guide coat equals smooth. I've found that alternating colors on the surface can give a false sense of what the surface actually looks like.

But the #1 rule is to do what's easiest for you and makes it an enjoyable experience.

-Rog

 

[Moviefreak]

I always alternate colors when painting just to see coverage. If you spray a new color on top, you will see if you miss any spots. Just a quick and fail safe way to ensure coverage.

 

[Kokanee]

All great answers, thanks for your time!