John, Thanks so much for your advice. I was concerned that the Milliput was not curing, so I dug out the first attempts just to be careful. I kept the small pea sized amount I use as a tester which eventually did harden. Whew. The photo I posted is the redo. I was tired and my description was not very clear. The shallow fills are more nerve wracking to me than deeper grooves.
Tonight I will polish these up then add a thin layer of CA. The plastic surface of this model is very shiny.
Thanks for the link, Carlos. It is always a pleasure to follow along with your work! Nice work filling this fuselage gap!
B-26 by Carlos