| Definition |
 |
Ring-shaped marks in the
middle coat. |
| |
|
| Cause |
|
Priming material applied
on repair area was not sanded down sufficiently. |
|
Putty and surfacer were
applied on middle of elastic or solvent-sensitive
factory finish or refinish material. |
|
Surfacer was not allowed
to become fully cured before it was sanded
and recoated. |
|
The substrate was not fully
cured. |
|
Too much surfacer was applied
(excessive film thickness) and then not allowed
to dry properly. |
| |
|
| Prevention |
|
Carry out a solvent test
on the area immediately surrounding the repair
(elastic / hard). |
|
Apply putty on bare metal
only. |
|
With elastic / solvent-sensitive
factory finishes, apply surfacer over complete
panels. |
| |
|
| Remedy |
|
After the middle coat has
become fully cured, lightly sand and polish
damaged area, if necessary isolate with a
surfacer and respray. |
