Back at work on the roof. Did some shrinking on the two figure 8 oil cans, then sanded all the marks off and started over. I have 4 distinct oil can spots now (see the picture - looking from back to front). The ones numbered 1 and 2 in the photo were the two figure 8 ones. They've gotten a bit smaller, but there's still a large overlapping one (#3), and another smaller one has reappeared to the left rear (#4). It kind of feels like I'm chasing these around. Still working with the PVC coupling and convex hammer, which does seem to work well in shrinkinig. Have not gone to heat.
Anyone have any suggestions? I'm having trouble identifying the spots around the perimeter that are locked per Robert's explanation. Should i be shrinking in a line (curve) around the perimeter? That's what I've been doing in basically parallel rows of hammer blows. I'd sure like to get this knocked out
soon.
