My old eyes aren't as good as the used to be. I think having brighter colors on my sights may help. I have considered Truglo, etc and am not sure I want to spend that kind of money on several guns. Has anyone used this product from Bright Sights Bright Sights High Visibility Gun Sight Paint. Has it helped the sight picture? Is it durable, removable? Any other considerations I should look at? Any other paints you have used that maybe better?