Rust Repair Maiden Voyage
I didn't fill it from inside the trunk. I just used the caulk gun to squirt it in through the rust holes. I wanted to start from the bottom and work my way up, to make sure not to leave an empty cavity at the bottom. You have to look to see it from inside the trunk. Here's a shot looking downward at the edge of the trunk. The black is rust reformer and the white is the filler.
I could add a little more from the top, but I don't think it would do any good. It looks like all the rust started from the seam where 3 panels come together: the trunk dropoff, the inner quarter, and the skin. That seam was open to water/dirt/salt coming in from the outside. I believe if I seal that from the outside, then the inside will stay pretty dry from now on. The visible white blob in the picture below shows where that seam is.
One thing I don't get is how water is supposed to get out of the rear quarter if it gets in. The rocker panels have openings that look like they are supposed to be drains, but the quarter seems completely sealed. I guess drain holes there would do more harm than good? Maybe the pinch welds are supposed to be leaky enough to drain water out? I'm also not sure why the inner quarter needs the 2-inch opening that has to be sealed by a plastic plug. Anyway, I no longer have that opening because that whole area is filled in.
The resin weighs about the same as water, say 8 lbs/gal. But the mix is mostly silica, which weighs basically nothing. I bet the filler I added weighs less than the scale and dirt I cleaned out.
I didn't fill it from inside the trunk. I just used the caulk gun to squirt it in through the rust holes. I wanted to start from the bottom and work my way up, to make sure not to leave an empty cavity at the bottom. You have to look to see it from inside the trunk. Here's a shot looking downward at the edge of the trunk. The black is rust reformer and the white is the filler.
I could add a little more from the top, but I don't think it would do any good. It looks like all the rust started from the seam where 3 panels come together: the trunk dropoff, the inner quarter, and the skin. That seam was open to water/dirt/salt coming in from the outside. I believe if I seal that from the outside, then the inside will stay pretty dry from now on. The visible white blob in the picture below shows where that seam is.
One thing I don't get is how water is supposed to get out of the rear quarter if it gets in. The rocker panels have openings that look like they are supposed to be drains, but the quarter seems completely sealed. I guess drain holes there would do more harm than good? Maybe the pinch welds are supposed to be leaky enough to drain water out? I'm also not sure why the inner quarter needs the 2-inch opening that has to be sealed by a plastic plug. Anyway, I no longer have that opening because that whole area is filled in.
The resin weighs about the same as water, say 8 lbs/gal. But the mix is mostly silica, which weighs basically nothing. I bet the filler I added weighs less than the scale and dirt I cleaned out.
