During my build I had to work through perfection paralysis. The little rivet smiles and dimples are easy to hide during painting. Don't perseverate over those inconsequentials if you can help it. If you are looking for a Grand Champion you may need to refine your technique a bit. I understand it is hard to get an award with the first build, though I hear it happens. However, if you want a plane to fly and can accept a utilitarian approach, it is best to move on. Even with those occurrences during the build, if you finish the project, those blemishes will pale in significance compared to the satisfaction you will feel and the praise from those who marvel at your success.