How to Apply Shellac
In this guide Paul will show you how to apply shellac to your project, this can be adapted depending on the project and the coverage you want to achieve.
Before applying finish to your project, make sure you have removed any dried glue as this will be visible on your project after the finish is applied and is more difficult to remove after the finish is applied. Use a sharp chisel or a plane depending on the size and location of the area.
Paul uses a hake brush this is because it doesn’t hold too much product and is wide and thin which gives an even coating to the surface. The thin, soft bristles don’t leave any brush marks so you end up with a flawless finish. You can use a regular paint brush with natural bristles too.
Apply to end grain first, leave time for it to soak in and then, once the rest of your project is coated, you can add another layer onto the end grain. End grain absorbs finish quicker and usually needs more coats than long grain surfaces. Coat your project along the grain, then across the grain, then along the grain for a second time. This will ensure any brush stroke marks are going along the grain which makes them less visible, it will also even out the finish. You don’t want the shellac to drip and run, but if you find a drip make sure to brush it into the project as soon as possible. Paul usually applies 3-4 coats of shellac.
Leave the project for a minimum of an hour once coated before you apply the next coat.
Sand with 250 grit after the first coat as shellac causes the grain to rise and air pockets in the wood will also cause the surface to become textured. Sanding will remove any surface nibbing to give your project a smooth finish.
To coat the underside on smaller projects, screw 4 screws into a scrap piece of wood and use the tips of the screws to rest the project upon. This will enable you to coat all sides with minimal contamination to the wet surface. For larger projects, depending on space, you can either apply shellac before you put the project together or once it is fully constructed.
Use steel wool (#0000) after your last coat has dried, this buffs out any imperfections in the finish.
For the final step, dip the steel wool into the furniture wax and apply to your project. You do not need a lot of this as a small amount goes a long way. For more information on buying furniture wax, steel wool and shellac, you can find more information on in our Consumables guide.
It is a good idea to coat all the surfaces of your project as this reduces the ingress of moisture. On surfaces that won’t be seen, eg. insides of boxes or undersides of tables, apply one coat less to these areas.
If your project has metal add ons such as hinges, use the brush to cut in around these. If you get shellac on them it can seep into the joints and stiffen the mechanism so it is best to avoid this.
Shellac is water resistant but will not withstand large amounts of water.
If you notice a drip mark after it is dry, use some 250 grit sandpaper and sand it until it is level with the rest of your project.
Izzy. Thank you
This information, to me, is really helpful thank you so much
The shellac used is clear, are there colours available or do you have to add colour separately?
Shellac is naturally red/brown but can be bought bleached, you can also add colour to it. You can find out more about shellac in our Consumables guide.
I am curious if shellac flakes degrade over time? I purchased several pounds of flakes from a retiring furniture restorer but am experiencing gelatin-like globs that refuse to go into solution (>95% ethanol). The flakes look ok but could be many years old!
Loath to throw anything useful out, perhaps these have some other use?
Thank you for getting in touch.
I passed on your message to Paul but he’s never experienced shellac flakes ‘going off’ so can’t really help.
I’ve had some flakes for years, and while I sometimes get bits that refuse to dissolve, I find that is more to do with the temperature in the room than the flakes.
I always strain my shellac through a paint filter after dissolving, so that picks up any stubborn bits.
Can I shellac a bookcase? And how long do I have to wait before I put books? Also is the wax necessary? Thank you for your time,
Yes, shellac works exceptionally well for this type of project. It drys and cures quickly. I would say leave it for 8 hours after the last coat to be sure. No, the wax is aesthetic.
This is very informative & well written. Keep doing great work.
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