A good save, Colin.
Both the chip off and spider leakage are corrected very nicely.
Some great airbrush work done.

Truly excelent!

Thanks, guys. I appreciate the empathic observations on paint mishaps. I am forging ahead with fingers crossed. I figure I can handle local flaws better once the main painting is done. Here is an update on the masking process and painting of the second color. As I showed earlier, I prepared some camo outlines on "tracing paper" (actually Airifix decal protector paper) and so got those out to match to new masks to be created for the fuselage.

I began to create paper masks using the translucent paper as a guide. I contemplated doing the fuselage demarcation with silly putty but decided against it after finding it too sticky and awkward. BTW, the masks all have excess length to fold under the wings and fuselage where they are taped down. The tension keeps them in position during painting. In this whole process I also kept checking how the mirror camo looked in both the kit painting guide and my Osprey book. The pattern is based more on the latter and period photos as I think Special Hobby is wrong in places about some shapes. I changed the port wing pattern slightly when it got to paper form and followed my original outline otherwise. BTW, I have masks for the roundels to make sure there will be no ghost of a camo line running through the roundel decal. The mask breaks this line. The tracing paper was helpful to drape over the round fuselage but I need the paper to be stiffer and not likely to get blown off position by the airbrush. The wing and fuselage masks mostly conformed as much as I needed them to. I want a tiny bit of underspray since the RAF camo has a slightly soft line. Some corners and curves needed clumps of silly putty as well as the front of the cowling. It helped to tack down the paper as well as add curves. Final photos show the RAF Green applied. I am not going to remove the masks until I inspect the model fully for any spots I may have missed. Touch ups will follow tomorrow and then removal of the masks. I also include some shots of the prop hub after removal of the cylinder mask. It worked perfectly - nice and symmetrical and a very clean line. Here it is rotated to see the accuracy of the mask. Unfortunately the SG Black flowed under the Tamiya tape a bit for the prop tips. I can fix this quite easily later on with some careful sanding and a tiny respray of yellow. I hope you like the results. Sorry about the suspense on the masks, I can barely contain the urge to pull them off myself at this stage. Patience will pay off until painting is done.

You are the master of masking, my friend @coling!
Once again your attention to detail is phenomenal.
Eagerly waiting for those masks to be removed!

Thank you for your kind responses, gentlemen. Today I have done the touch ups and removed the masks. For the most part, I am very pleased. No paint lift at all on the upper surfaces. None on the demarcation line on the lower fuselage, either. The lines are just as lightly feathered as I wanted for the RAF standard.

No corrections to do there, except on a small part of the cowl and around the fuselage stripe in one place. No leakage past the cowling masks in to the engine (that was a relief, it would have been very hard to fix). The paint is very smooth and mostly lint free as well. Here is one pic of the undersides. Obviously there is some lifting near the leading and trailing edges but none in the middle. I will be able to fix this quite easily (I think), by sanding to adjacent panel lines and respraying with tougher Tamiya paint. I am very pleased that there was no lifting at all at the demarcation line with the upper camo. I was concerned about this at the aft fuselage and on the cowling but my Tamiya clear barrier seems to have protected the paint well in both places - phew! I hope you like the results. I am very encouraged. Just have to wait a bit for everything to fully cure before doing repairs. Thanks for watching!

Looking good, Colin.

That is some fine work Colin. The mix of colors are a winning combination and a good choice. Decal time. . . .

Colin, this incredible paintwork and the brilliant radial detail is wonderful. I know when the canopy mask is removed your excellent cockpit detailing will be revealed - really looking forward to the next update!