A couple of my injectors are wet. A couple of return line nipple barbs are a bit scratched and dented, so I think this is the problem. Is there any way of fixing the nipples, or is getting some "new" used injectors the way to go?

There are bubbles at the bottom of these injectors, looking as if they are not torqued down tight enough, but they're tight and the crush heat shields were new. Could there be some other common problem that I may have overlooked?