Oil Primer Undercoat Paint Finish

This oil primer undercoat paint finish is the ideal base for oil based Eggshell and Gloss paints where durability and protection are the prime considerations. Ideal for use on pre-painted or bare wood and metals as the perfect preparation for oil-based finishes.

Surface Preparation Guide

Hardwood
Not recommended for direct application to resinous hardwoods. Resinous hard woods require cleaning and treatment with Little Greene Aluminium Wood Primer (consult the relevant product data sheets for further details) prior to undercoating. For non resinous hardwoods, lightly sand just prior to painting for best performance. Seal knots with a proprietary knotting compound.

Softwoods
Lightly sand wood, just prior to painting, for best performance. Seal knots with a proprietary knotting compound. Ensure moisture content of the timber is below 15% before commencing application.

Damp wood should never be painted as this may give rise to blistering, flaking, cracking and premature coating failure. Green oak should not be painted unless it has been weathered for at least 6 months.

Metals
New ferrous metalwork should be hand, or mechanically cleaned, to remove any surface rust before application of Paint & Paper Library Oil Undercoat. Non ferrous metals must be pre-treated or primed with an appropriate proprietary primer.

Existing Paint Finish
Remove all loose and flaking paintwork. Degrease with a suitable detergent solution, such as sugar soap, followed by clean water rinse. Rub down thoroughly with a medium grade sand paper to provide a key and a defect free smooth surface, “feathering in” areas where paint has been removed. Make good any repairs, sand and apply primer to exposed surface as appropriate.

Plastics
For long term performance, clean & lightly sand down surfaces, using a proprietary adhesion promoting plastics primer before applying the finishing coat. When item is to be fully encapsulated in the paint (such as external down pipes) then a light rub down is more than adequate.

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Application

Stir thoroughly before use. Do not apply to surfaces when the ambient temperature is below 5˚C.

Brushing
Use a high quality natural bristle brush that is suitably sized for the project at hand. New brushes should be conditioned by washing in clean white spirit and thoroughly drying with a clean, lint free, cloth. Avoid immersing brush too far into the paint to prevent paint from entering the ferrule.

Avoid drips and splashes by not overloading the brush. Apply paint in even strokes and only extend painting area such that a wet edge can be easily maintained. For the highest quality appearance, keep final brush strokes all in the same direction and never go over paint that has already begun to dry.

Note that some softwoods may require a 5% v/v addition of white spirit to Paint & Paper Library Oil Undercoat to ease application.

Roller
Use a short nap mohair type sleeve for best appearance on smooth surfaces. Increase nap length for textured surfaces, as appropriate, to ensure even and thorough coverage.

Keep final strokes all in the same direction, maintaining a wet edge throughout. Never be tempted to go over already drying paint as this will lead to lap marking and flashing.

Recommended Finishing System
Finish with two coats of Paint & Paper Library Oil Gloss. Additionally, Paint & Paper Library Oil Undercoat may alternatively be finished with Paint & Paper Library Architects Eggshell (consult the relevant product data sheets for further details).