I took the battery and battery platform out tonight and got way down there in the corner behind the battery...cleaned a lot of rust out and now I have a 3" hole which communicates with the inside of the front fender as well as the passenger footwell.

I think I've cleaned most of the rust off, and cleaned out the drain which caused the problem in the first place and I've sprayed the hell out of it with Rust Converter. I'm not looking for a super-duper auto restoration fix, just so I don't have water pouring on my wife's lovely feet.

Is there a tip or trick into getting up there with fiberglass? I don't want to close up the drain but, to be honest, I'm not really sure where it should go...