Filling Holes

[DrEntropy]

That area doesn't look too deep, a filler after you've well sanded the patch area with Vette's suggestion (100 grit wet-or-dry) that we've had good outcome from is "Dolphin Glaze." A two-part filler and meant as a spot putty. But we've had good success with it as a buildable filler for similar shallow defects. Patience is the most important "tool" when doing that kind of work. The top coat is only as good as what's underneath. That's 99% of the final appearance.

 

[Deamaker 5]

Cant tell from your pictures if that repair is on the shroud or the fender. If on the fender then as said earlier the fenders would be steel. But anyway in doing the painting, the rattle can approach will not give you a high probability to match colour or to blend in the new paint to the old. Base clear paint is a catalyzed, 2 part paint that cures very hard. It can be wet sanded well and buffed. Rattle can paint is not catalyzed and will not cure hard at least not for a very long time. Like months and months in the hot sun. Also to build up enough layers (thickness) to be able to wet sand is difficult. I didn't catch in the previous post what colour your car is. If it is metallic like Healey Blue you can not wet sand the colour it will ruin the metallic. You must spray the colour very smooth and then clear coat it, let the clear coat dry as hard as possible then buff the clear coat. I don't believe you will get enough clear coat from a rattle can to wet sand it, maybe a little but it is contingent on how thick you make the clear coat. Another thing is that if the current paint on the car is a catalyzed clear coat, an over spray of another clear coat with attempting a blended edge doesn't work very well. Many times you will always see where the new clear coat left off and the old starts. But there is a method to do it.
There is a product called clearcoat blending agent. Just before you spray the clear coat, you take this stuff and spray it on the area where the blend is to occur. Very lightly. What is does is soften the original clear coat to allow the new clear to melled into it. But you have to use it very sparingly. And sometime it doesn't work that well. By the time you have done all this you have a lot of work into it and you also have a larger area affected that you might expect. And the colour match may very well be noticeable. It is usually a better approach to just repaint the whole panel. If the colour match is off then it usually won't be as noticeable as if you tried to blend it.

The panels are so small on these cars you are better to spray the whole panel