How to Polish Epoxy Resin

Hello everyone, welcome back to Let's Resin. Today, we're going to show you how to polish or smooth edges without a large polish machine. The tools used today are all from Let's Resin's product Resin Polishing Kit. Specific product descriptions are shown in the video.

⭐ Beginner

⏳ About 1 day

Additional materials:

- Water
- Polishing wax

How to make

Sand crafts of different shapes

①Polyhedron
②Sphere
③Table

Step 1 (Timeline: 2:55-3:18)

We select the part and get out the file for sanding. A file is rougher than sandpaper, which will help a lot at the first sanding stage and save time for the next step. Then, Sand the rough areas first. It's best to sand evenly in one direction so that the original shape of the piece is maintained.

Step 2 (Timeline: 3:19-4:14)

Remember to spray water to moisten it when polishing, this will prevent dust and a lot of debris from affecting our polish. Please note that you must keep spraying water while sanding the debris. After spraying the water, then continue sanding.

Step 3 (Timeline: 4:15-4:37)

Don't leave any edge untouched. In this way, every part of our piece will be polished and the whole piece will be polished smoothly and beautifully.

Sanding to the point where it looks rough but is almost round to the touch, as we did, is basically sufficient.

Step 4 (Timeline: 4:38-5:14)

We also have to smooth the file, we don't need to make it shiny, but we do need to round off this tip so that it's very smooth and curved to the touch, not sharp like this.

Just file it down to this level. It's not sharp, it's a little curved. When it's all sharpened, it'll be shiny and not scratchy.

Step 5 (Timeline: 5:15-5:31)

We'll start with the roughest piece of sanding paper and work our way up to the finest until we've sanded the piece all the way through.

We can cut the sandpaper which makes it easier to hold and there's no waste.

Step 6 (Timeline: 5:32-5:42)

Pinch the sandpaper between the thumb and middle finger, and place the index finger in the middle of it.

In this way, we have better control of the force and there is no slippage.

Step 7 (Timeline: 5:43-6:29)

Polish it again where we just used the file to polish. We can spray with water if there is dust during the sanding process.

Please pay attention to sanding evenly and do not leave any edges. After the first pass of sanding, its surface will be finer than where it was polished with a file.

Step 8 (Timeline: 6:30-7:30)

So next we need to use finer sandpaper to sand it. Take a 600 grit sandpaper and cut it to size. Hold the sandpaper with the same motion and continue to sand it. We can spray some water during the process. Next we used 1,000 grit sandpaper for sanding, and it worked even better this time.

Step 9 (Timeline: 7:31-9:10)

Then we'll switch to 1,500 grit sandpaper and success is close at hand. Next we take out our 3,600 grit sandpaper and pinch it. This sandpaper doesn't have a very coarse grain anymore, but it still has a bit of a sanding effect. It's our last 5,000 grit sandpaper. After polishing with this sandpaper, we can use the polishing block.

Step 10 (Timeline: 9:11-9:36)

Then take out our polishing block which has rough and fine sides. Now we just need finer side. This is the final polishing of our craft. The polishing block can be used over large areas because it has very little friction. Even if you rub it into a smooth area, it won't hurt it.

Step 11 (Timeline: 9:37-9:58)

Finally, we need to use polishing wax to give it a layer of wax. Dip a little wax into the polishing cloth and apply it evenly on the polished craft. It's not only smooth but also translucent. Then, apply the wax on the remaining area.

Let’s appreciate the finished craft. The sharp edges have turned into smoothly transitioning arc edges.

Step 1 (Timeline: 10:12-10:32)

Use a file to sand off excess resin and pitted areas. We can see that there are many small bubbles attached to the surface of the craft, which can also be removed by polishing. At this time we can spray some water. And the up-and-down polishing method will not produce a lot of debris.

Step 2 (Timeline: 10:33-11:22)

Just use a file to sand off the larger areas of excess resin. After grinding for a while, the gaps in the file will be filled with debris and it will not be sharp. At this point, you can rinse the file with water to remove any debris from the crevices, which will make it better for polishing.

Step 3 (Timeline: 11:23-11:37)

Next, let's use sandpaper to polish the surface of the sphere. But the spheres are sanded differently than squares. We can hold the sphere and rub it directly on the sandpaper, which will be faster and less laborious.

Step 4 (Timeline: 11:38-11:54)

And pay attention to grinding every place and changing the angle of the sphere. During the polishing process, we can spray some water on the sandpaper to increase its friction. Polish it until all air bubbles disappear.

Step 5 (Timeline: 11:55-12:42)

Now switch to 600 grit sandpaper and continue polishing. If there are still some sanding marks, we can use a larger grit sandpaper to continue sanding. Let's switch to 1000 grit sandpaper. Then we'll switch to 1500 grit sandpaper, 3600 grit sandpaper and last 5000 grit sandpaper.

Step 6 (Timeline: 12:43-12:56)

Finally, apply a coat of wax to the sphere with a polishing cloth.

Step 1 (Timeline: 13:00-13:14)

Due to the relatively large size of the tabletop, it basically just sits there to be polished. We need to sand it until it is smooth.

Step 2 (Timeline: 13:15-13:41)

The next step is to sand the edges of the table with varying grits sandpaper. Now switch to 600 grit sandpaper and continue polishing. Then we'll switch to 1000, 1500, 3600 and last 5000 grit sandpaper.

Step 3 (Timeline: 13:42-13:51)

Here we go again with the polishing block. Use it to polish the table evenly and quickly

Step 4 (Timeline: 13:52-14:08)

Then apply polishing wax when finished polishing which is the icing on the cake. We just polished part of the tabletop, and the contrast is very obvious.