assembly tricks

[fuelpump]

So I take the wood out of my bed to clean it and revarnish it. It was easy enough to take out with a socket wrench and an extension. But now I go to put it back in and I can't find an effective way to hold the flat washer and lock washer on the bolt so I can get the nut back on. There is just not enough room to get both hands up in there. So how did you guys do it?? A magnetic socket would probably do the trick but I've never heard of such a thing. I thought maybe put a dab of silicon sealent on them but that would make a mess when it dries. Heavy grease might do the trick but then you run the risk of haveing the nut come off. So whats the trick??