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Sanding door frames to remove paint from doors (internal or external doors)

To prepare wooden doors for a new coat of paint, you should first carefully sand off any impaired coatings. This application example describes a quick and clean method for achieving an accurate result with coarse and fine sanding. Intermediate sanding for a new coat of paint is also explained.

    Description

    When renovating old wooden doors, whether internal or external, you must first remove old impaired coatings before applying a completely new coat of paint. The paint layer, which often consists of several coats, must be removed in an environmentally friendly and cost-effective manner. 

    Burning off with a hot air gun: Time-consuming and causes vapours that are toxic to the user
    Stripping or removal with a lye-based solution: Harmful to the environment and damages glue joints in framed doors 

    Solution: Sanding with the Rotex RO 150. This enables quick, clean and environmentally friendly removal of paint from a wooden door. 

    Tools/accessories

    The following tools and accessories are recommended for use in this application example:

    Alternative tools

    The following tools and accessories are recommended as an alternative:

    Procedure

    • "Coarse sanding" method

      • Attach Granat P 40 to the Rotex sanding pad.
      • Adjust the sanding movement of the Rotex to "rotary motion". (coarse sanding)
      • Start at speed 2–3. You can even increase the speed if there is no clogging on the abrasive paper.
      • Sand off the old door paint. Hold the Rotex eccentric sander with both hands and guide it over the surface of the doors.

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      Sanding off old door paint
    • "Fine sanding" method

      • Attach Granat P80 abrasive paper to the sanding pad.
      • Switch the sanding movement on the Rotex to eccentric motion (fine sanding).
      • The entire surface is now fine sanded with a grit size of 80. The sanding pad is placed flat against the surface and the tool is guided with slight pressure. Any sanding marks caused by the coarse P 40 abrasive paper are now sanded off. The final result is a surface ready for painting. The sanding finish can be further refined with P 120.

      Tip: Finer pre-sanding is required for the new generation of paints (VOC). In this case, the substrate must be prepared with a grit size P 150/P 180

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      Fine sand the entire surface
    • Intermediate sanding for a new coat of paint 

      Intermediate sanding of the new undercoat (primer) is carried out with the same setting (fine sanding).
      Using Granat P 240-P 400 abrasive paper, you can achieve a top surface without sanding marks on the doors.

      Tip: With the new generation of VOC paints, also use fine grit sizes P320-P400 and reduce the speed when applying the abrasive (level 2–3).
      Alternatively, use Granat Net P240-P400.

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      Intermediate sanding of the primer with the same settings
    1. Our illustrated guides and work results are documented working steps that we have performed in practice. They are individual examples and do not guarantee or promise that users will obtain the same results. The results will depend on the user's experience and skill, as well as the material being used. Illustrated guides do not replace any Festool operating manuals and/or safety instructions. Liability for ensuring that the information, instructions and applications are free from content defects and defects of title, in particular with regard to the absence of defects, correctness, freedom from third party intellectual property rights and copyrights, completeness and fitness for purpose, is excluded. Claims for damages made by the user, regardless of their legal basis, are excluded. These liability exclusions are not applicable if the damage was intentional or caused by gross negligence, or in cases of statutory liability.

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