PDR – Difficulty Factors

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PDR – Difficulty Factors

PDR Techniques (Difficulty Factors)

There are quite a few variables to consider in determining the difficulty of repairing dents, and as you will see in subsequent modules, access points. It takes knowledge and appreciation of these components as well as experience to quickly determine the viability of access points and what approach to take to apply the appropriate techniques in PDR repair.

Factors that will affect the difficulty of repairing dents

  • size
  • depth
  • metal type steel versus aluminium
  • thickness of the metal
  • access point
  • colour
  • owners expectations (fussy customers compared to those who would in mines for instance)
  • repair location environment
  • dent location on panel
  • panel glue inside panels
  • tool selection
  • temperature
  • repair method to push or pull
  • identifying non-original paint

All these factors are in some ways considered when determining strategies of repair. This of course will become natural over time and in some cases trial and error with a low failure rate is the best form of approach. Experienced technicians know what tool to use in what scenario based on access for instance but may try a different tool or tip in different cases if one is not doing the job.

Push to Paint Rating (often referred to as PTP) difficulty 5

  • can’t fix without damaging paint work
  • next best PTP and respray
  • saves the integrity / originality of the colour
  • use body filler

Cant rail difficulty factor 8

Triple metal layers

  • ~90% cant rail have no access points
  • so glue and pull process required

Struts on roofs pull and push difficulty 8

  • difficulty due to access
  • may require alternate access
  • use glue cutter (knife) to release
  • re-seal damaged glue to stop the vibrations
  • double panel

Struts – tailgate / bonnets difficulty 6

  • difficulty due to access but better than roofs
  • may require alternate access
  • use glue cutter (knife) to release
  • re-seal damaged glue to stop the vibrations
  • double panel

In determining difficulty factors, access points are the most crucial for leverage that is required for efficient PDR. Applying the appropriate pressure in the various situations is also vital.