Painting & Drawing blog

MY FAVOURITE OIL PAINTING HACKS

Painting in oils is little messier and more time-consuming than painting with acrylics or watercolours, largely because you cannot clean or thin oil paint with water. Both the paints and the mediums you use to clean and dilute them with are on the expensive side and it’s easy to waste them. Despite this oil painting is well worth the effort, so here are my favourite tricks to make the experience easier, cleaner and more economical. There are no paid links on this page, just my personal recommendations for some helpful products.

1. Arrange paints on your palette according to their colour

It may sound a little obsessive-compulsive but putting out my paint colours this way has saved me so much time wasted searching for the colour I want! I arrange similar hues together according to the colour spectrum: reds together, greens, blues and so on. Even if you use a very limited number of paints, arranging them in the same order each time will really help you to locate the colour you want quickly. I’ll put white in the middle because I so frequently use a little of it in each colour mix that I make. I’ll also leave some space in the centre of the palette for making up those mixtures.

Paint on palette

2. Don’t squeeze too much paint out onto your palette before starting your painting

This one may seem obvious, but I still find that it’s incredibly easy to squeeze out too much paint and end up wasting it. Remember that strong colours with a high tinting strength like many reds and blues – particularly those made from the modern synthetic pthalo and quinacridone pigments – go an awful long way when used mixed with other colours. I tend to find that these are the ones I waste the most because I end up needing much less than I put out. Squeeze out a really small blob of paint at first, and add more as and when you need to.

3. Before you wash your brushes, remember to wipe them

You’ll find that using ‘artists’ white spirit or other solvents to dilute your paint or rinse your brushes in between colours can get expensive. Each time you dip your brush into the jar your spirits will get more and more saturated with particles of paint pigment until they’re too muddy to be usable. It might be tempting to economise by using regular white spirit from a DIY store and keep throwing it away, but please don’t do this as cheap spirits will contain impurities that will damage your paint layers.

You can keep your spirits clearer for much longer if you remember to get as much paint off your brushes as you can before immersing them. First use a palette knife to gently scrape off as much excess paint as you can, and then wipe each brush on an old rag or piece of kitchen paper. You’ll be surprised how much difference this will make.

4. Use coffee filter paper to strain and re-use your spirits

This is a way to make your spirits last much longer and avoid environmentally unfriendly wastage. When you finish your painting for the day keep your jar of spirits (or whatever kind of solvents you use to dilute your paint) instead of throwing it away. When you return you’ll see that the paint sediment has sunk to the bottom, leaving the liquid on top. It may be a little yellowy, but it will be perfectly good for diluting any colour that isn’t very pale, or for rinsing brushes or cleaning your palette with. Tipping the jar gently so that the sediment stays largely on the bottom pour the spirits into a jug or jar, straining them through a coffee filter or piece of kitchen paper rolled into a funnel shape. You should end up with quite clear and reusable spirits. 

Coffee filter

5. Use specialist soaps to clean your brushes and your hands

It took me a while to realise that you don’t need to use harsh white spirits to clean your hands or your brushes after you’ve been oil painting. It isn’t good for either of them, and leaves you smelling unpleasantly of spirits for the rest of the day! There are some great products such as General Pencils’ famous ‘The Master’s Soap’ (for your hands) or ‘The Master’s Brush Cleaner’ which will do the job much more gently. Their formulas are considered proprietary information but they are definitely vegetable-oil based and non-toxic. To use them you wipe your brushes and then dip them in the paste and lather them up well with water, before rinsing them off.

Other oil based cleaning products for both brushes and hands include Jacksons’ ‘Marseille Soap Pellets’ and Da Vinci and Escoda’s specialist artists’ soaps. For cleaning brushes a popular product is Weber’s ‘Turpenoid’ turpentine substitute which is low odor and non toxic.

6. Dry and reshape your brushes after cleaning them

Good paintbrushes aren’t cheap and you need to look after them properly! A specialist product such The Master’s Brush Cleaner or something similar will be less harsh than washing them with spirits. Be sure to dry them well afterwards, particularly natural hog brushes which an actually get mildew if put away damp. Dry them gently with a paper towel and as you do so shape them gently to a point, which will help the brush maintain its ‘spring’ the next time you use it. 

7. Restore your old brushes

When you clean your brushes it can be difficult to get all of the paint out of the ‘heal’ of the brush, which is the part where the bristles are clamped to the handle by the metal ferrule. However if you’ve let too much paint dry on your brushes, it’s perfectly possible to restore them back to health. The Master’s Brush Cleaner works as a restorer as well as a cleanser.  For this you work up a lather with some hot water and let the brush sit for a while resting on its side, before rinsing it off. Repeat as many times as necessary until the dried on paint is gone. To get paint off the ferrule (the metal part of the brush) leave it for several hours before rinsing.

Another good product for removing dried paint is Winsor & Newton’s Brush Cleaner which is also water-soluble. You soak your brush in it overnight before rinsing it with water. Make sure you don’t leave the brush upside down in a jar and touching the bottom, as the bristles will bend permanently out of shape! I like to clip my brush with pegs to keep the bristles safely suspended in the solution.

Suspending brushes in brush cleaner

8. Clingfilm (plastic wrap) any colours you want to keep on your palette in between painting sessions

Oil paint dries when the oil that is added to bind the pigment together starts to oxidise. Therefore if you cover your painting palette when you’ve finished a painting session to limit further exposure to the air, you can keep most of your squeezed-out paint workable until the next day. Once you’ve scraped off any mixed-up colours that you don’t need any more, lay a piece of Clingfilm (plastic wrap) over your palette and gently press out any air bubbles. If you want to be more environmentally friendly you could use baking parchment instead, although this won’t create an airtight seal around the paint quite so effectively.

Paint that you’ve mixed together won’t last as long as paint that’s straight out of the tube, because more air has already been introduced to it. Very small amounts of paint or paint mixed with a lot of spirits or drying oils will still dry out even if you cover them with film. But larger amounts of fairly undiluted paint will stay useable for ages using this method.

Plastic wrap

9. When you’ve mixed up a large amount of a paint colour and want to keep the leftovers overnight or longer, store the mixture in a miniature jam jar with water on top

Sometimes I mix up a reasonably large batch of one particular colour for something like a background. If I haven’t finished using the mixture by the end of a painting session I want to keep it, instead of trying to make up a new mix to match the next day. 

There is a way of keeping a large paint mixture viable for weeks by storing it in a miniature jar – the kind of thing you get given in a hotel or on a plane. Scrape your leftover paint into the jar and then put a thin layer of water over the top. As oil paint is not soluble in water at all the water won’t mix with the paint but will form a complete barrier that stops any more exposure to the air and therefore oxidisation. When you are ready to use the paint again,  just open the lid and tip the water off.

Miniature jam jar

10. Keep dust off your painting using pizza boxes

One annoying problem I’ve  experienced with painting in oils is that dust tends to settle on a painting that’s left out to dry overnight and sticks to the paint. Even a painting that’s almost vertical on an easel will usually attract a bit of dust. I try to keep the studio dusted and vacuumed as much as possible to reduce the dust floating around in the air.

However to keep a painting totally free of dust you need to cover it whilst it dries, in a sturdy flat box. Ask your local pizza takeaway if they’ll sell you a few (unused) boxes. A deep-pan box should be perfect for even a chunky canvas!

Pizza boxes

NEXT: Try this post on oil painting techniques

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