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Painting the Exterior

Cleaning Down and Burning Off
Priming
Treatment of Doors
Puttying Up
Varnishing.

As outlined by Ray Lewhite of londonwidepainters.co.uk

Do not let your property suffer from paint starvation: it will prove expensive in the course of time. The result of this neglect often means rotten woodwork, of windows doors, and corroded spoutings.

Cleaning Down and Burning Off

If paint is to adhere it must be applied to a clean surface, so a good plan is to begin the job by giving the whole exterior of the house a good cleaning down. Use a strong extension ladder for the high parts, and as a safety measure when possible remove a little soil with a scraper and let the base of the ladder into the ground to prevent it slipping.
Exterior Painting
Commencing at the right-hand corner of the house, rub down spoutings with a wire brush to remove rust, then working downwards, glasspaper gable ends, window frames and doors to remove loose paint, and rake out loose putty from window sashes. Paint in a bad condition should be burnt-off with a hot-air gun, The old paint generally shrivels up and can be pushed off in strips. Do not play the hot air from the gun in one place to long; this chars the woodwork and causes the intake of moisture.
When woodwork adjoins glasswork it is wise to use a suitable paint stripper as there is a danger when burning off cracking glass. There are several electric paint strippers on the market, suitable for burning off and there is no danger of cracking glass with these tools.
Having completed the cleaning and burning off, coat protruding knots, on both old and new woodwork with knotting; this seals up the surface from resin, preventing it bleeding through on to a newly painted surface.

Priming

Exterior Painting
The priming coat of paint is the most important when painting exterior work, as upon this coat the whole foundation of the paintwork depends. The priming should be a oily paint suitable for standing up to the ravages of the weather. The priming undercoat and finishing gloss paint should be purchased all at the same time from a reputable maker.Fig.4,Illustrations

Stirring the Paint

Exterior Painting
Adequate stirring of the paint before use is important to incorporate oil, pigment and medium, and do the stirring in a spiral motion, till the material becomes the consistency of cream. Use a hook for holding the paint container to the ladder and work from right to left. Put the paint on in a thin coating and brush in well. If the inside of the spoutings are reasonably dry paint them also. On exterior woodwork the priming should satisfy the porosity of the wood by allowing adequate suction, filling up the cells of the wood. The priming paint should have enough linseed oil in it to be elastic and allow for expansion when the undercoat and finishing is placed on top of it.

Windows and Doors

Paint the window sashes with a half inch. brush; a cardboard or tin shield will be found handy if held against the glass when painting to prevent the paint from contacting the glass. The window sills should also be given a good coating up. Paint the doors by commencing with the panels marked 1 then follow on with the section marked 2, and so on, finishing off with upright styles marked 4, as shown in Fig.6; complete the edges last, and wipe off surplus paint.

Puttying up Glass-papering down and undercoating

Exterior Painting
Allow ample time for the drying off of the priming, then dry rubdown with glasspaper and dust the whole surface off. Next putty up window sashes, cracks etc., in doors and joints in spoutings(Fig.7). The latter is important to secure waterproof joints. The next job is the application of undercoating, and this will be found to dry quickly. Should the paint become too thick during application add a little white spirit to it and stir-up well. When under-coating is dry give it a good dry rubbing down to ensure a smooth surface for the finish coat.

Finishing

Exterior Painting
In the finish the matter of colours for weather work is often a personal choice. Popular colours which go together are: cream and green, brown and cream, mahogany and buff, stone and black, etc. Colours can be intermixed to obtain different tints. A pleasing effect can be obtained by painting windows and doors in two colours. Example: Inside sashes of windows cream or white, the outside frames green.
Try to apply the finish coat on a warm day and always beware of runs, they have a tendency to spoil your work, runs being caused through overloading your brush. Avoid these defects through careful application of the material; apply a little at a time just enough to cover, then brush up and down, crosswise, and lay off with a light stroke. When finishing paint works stiff, heat the container to thin it out. Avoid over-thinning of gloss paint as this as a tendency to dry dull.
An oak effect can be achieved on your front door by coating the surface with dark or light buff and then staining with oil scumble stain. A dry brush or steel graining comb is drawn over the stain while wet to achieve the plain grain seen in oak wood. This kind of finish should be varnished when dry as a protection against the weather

Varnishing

Exterior Painting
It is a good plan to give all kinds of exterior paintwork a coat of good varnish at intervals of six to 12 months if possible. This of course protects the paintwork and gives it a renewed and fresh appearance. Use pale varnish for light colours and do the job in warm, bright weather.
All property should be painted every five years, but this may not be necessary if kept well varnished. When old paintwork is in a fair condition it will be sufficient to renew the putty, lightly undercoat and rub down and finish, or perhaps a gloss coat may be sufficient after cleaning down.
Paint brushes should be looked after; to ensure their long life and efficiency. All brushes that have been used in oil paints should be washed out in white spirit after use. By boring a hole in the handles and passing a steel rod through them, they can be suspended in water as this keeps the bristles soft, and the water can be changed at intervals. When brushes are so suspended from the bottom of the receptacle it prevents the bristles from being turned up and crippled
A varnish brush should be suspended in a mixture of raw linseed oil and white spirit as water is detrimental to varnish. To prepare a good brush for varnishing, use it as a duster for a period till the bristles assume a chisel-like appearance at the ends, this makes the brush ideal for laying-off varnish. Brush keepers can be made from old empty colour tins. Keep brushes used for varnish apart from those used for colours. Also brushes used for light colours should be kept separate from them used for dark colours and a brush keeper should be kept for each individual colour. Go back to home page


Special Paint Finishes.