The application of three alternative paint primers is investigated, including a slow-drying oil-based primer, a fast-drying oil-based primer, and a fast-drying water-based primer. The treatment schedules employed, in particular the evacuation period after treatment, have a marked effect on subsequent paintability. Priming can potentially be carried out immediately after treatment with approved Timber Preservation Authority schedules, providing that (1) a fast-drying primer is employed (either water-based or oil-based), (2) solvent recovery by evacuation is continued for an extended period (45 min, c. -85 kPa) immediately after treatment, and (3) either the Lowry or the Bethell process is employed.

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