I have a 69 C10 which is my first restoration project. The previous owner caulked the inside of the drip rails in an obvious attempt to fix leaks. The front of the inside roof has rust pin holes so I will be getting the patch panel for that. When looking at the rails they look good but I'm sure there is rust in the channel under the caulking. I see that there are replacement drip rails for the sides but I don't see any available for the front. What do folks usually do? I've read that people have filled the rails. What do they fill the rails with? This seems like a better option considering I am a novice welder. Any tips on what to do with the rails would be appreciated. Thanks.