Put the body filler on in two phases and manage the time when you grate and sand it
Problem & Solution
Common among these chassis:
Classic Sedans
Ponton
R107
W108 W109
W110 W111 W112 Sedan
W111 W112 Coupe
W113
W114
W115
W116
W123
W124
W126
R129
W140
W201
W202
W208
W210
W211
W220
Watch Kent's Youtube video on roughing in a dent with body filler, grating it at the right time, and using coarse sandpaper to shape it before it gets too hard. This is a real effort and time saver.