Lacquer plywood?

[snowjim]

Hello,

I have a plywood board (think kitchen cabinet door) that is spackled and sanded, and now I want to varnish it with a durable and healthy varnish. A big difference from a kitchen door is that this board might flex a bit, so if there is varnish that is particularly good for this, it would be a great advantage. Skateboards are often varnished and they flex, so it should obviously be possible.

Previously, I've varnished a dining table with Trestjärnig oil varnish with a satin finish and a varnish brush; although the varnish itself turned out really nice, there were some streaks and debris in the varnish. It was then said that the procedure should be as follows:

- Sand
- Vacuum and clean
- Apply a thin layer of varnish
- Repeat at least 2 times but use sandpaper with around 200 grit

However, this resulted in stripes and the sanding, even when light, almost removed the layer that was varnished again.

Instead, I skipped sanding between layers and applied varnish generously so it flowed out on its own. This gave a significantly better result but, of course, some defects remained.

One thought is to use spray cans, but from what I understand, it becomes very expensive even for a small piece, and the surface becomes less durable.

I have a compressor that came with the following tools:





I suspect that one of these could be used for spray varnishing, which I assume gives a significantly better result? And then the question is what is required to achieve this properly?

Maybe you can get a sufficiently good result with a roller?

Maybe you need to thin the varnish?

Do you have suggestions for varnish? ZAR?

Of course, this is about a compromise; I want to achieve a nice finish, but it has to be within reasonable costs and reasonable work time.

 

[Avemo]

How many layers are you planning to apply? Regarding the technique you describe with a brush, I would suggest applying all layers except the final one wet-on-wet. Then wet-sand with at least 600 grit before applying the last layer. This can also be done when spray painting. But it doesn't look like a spray gun in the picture.

 

[snowjim]

How many layers were you planning to apply? Regarding the technique you describe with a brush, I would say you apply all layers except the last one wet-on-wet. Then wet sand with at least 600 grit before applying the final layer. You can do the same if you're spray painting. But it doesn't look like a paint sprayer in the picture.

I don't know how many layers one should apply. On the kitchen table, it was probably close to 10 layers, but as mentioned, some were sanded off, a lot of work. Now I hope I can do it right this time, and it's likely 2-3 layers that are needed anyway.

So I don't sand between layers but apply a new layer before the previous layer has completely dried? It sounds like you must spray then? Using a brush on lacquer that's partially set would likely make things worse.

No, you're right, none of them are paint sprayers, I see now. There should have been a paint sprayer included, which would look something like this:



However, it's an older version of the compressor package I have, so it's possible that the paint sprayer is completely missing.

 

[Avemo]

The picture shows a paint sprayer. The device with a white container above the handle. It is excellent for painting wet-on-wet with a brush. The paint should not be soft, but it should also not be fully cured. Often, you can find information on the packaging about the minimum recoating interval and the maximum recoating interval without intermediate sanding.

 

[Peter2400]

One thought is to use spray cans, but from what I understand, it becomes very expensive even for a small piece and the surface becomes less durable?

I recently discovered Maston One spray paints, painted for example a shelf from white to pink with one layer.
Covers very well, doesn’t run, and the finish seems durable.
https://www.hornbach.se/shop/MASTON...t-RAL9010-400ml/6005604/artikel-detaljer.html