Epoxy resin, what and how? worktop in the kitchen flooded with resin

I also have a problem with resin and I need help, preferably quickly, because I have already lost a lot of patience.
I wanted a resin countertop because of its durability and hardness. The table top is large, 7m square, 12m on the circumference (kitchen in the letter C. I bought the OSB 3 plate, the fitter installed the top and sanded the surface smooth. gi sold me some shit at a price 2x higher than Epidian from a legal distributor). I painted the first layer with a brush, the colors came out, but it was not 100% even because the osb board has the structure it has. The resin was either old or not Epidian 625, because on what I primed I poured a layer and the resin immediately took on the consistency of jelly and it did not spread. It was as if it reacted with this layer of resin underneath and continued. The seller told me to use a heat gun. After pouring everything I had, the layer was formed with craters or smooth surface and waves. I talked to a representative of Ciech Sarzyna and bought Epidian deco and deco hardener. The resin surface was sanded from the top (there is resin in the backing layer) the waves are generally ground down. And everything would be great, but I planned the amount of resin in a wrong way and at the end I ran out of it. I thought that I would have 7 portions because I had 7 kg of goods, but I did not take into account that I was making portions of 1 kg of resin + 400 g of hardener and I had 5 portions. Everything froze beautifully, a smooth, mirror surface was created, but there are a few small dimples on this surface, maybe a pollen of dust or a mosquito, because there were two of them, unfortunately. In addition, I bought resin and added the missing fragment, but you can see the connection point. I also sprinkled droplets into these dimples to fill.
And now the question.
I am thinking of sanding the connection point (or all) a bit with some 400 paper, to make it a little dull and maybe paint it with a brush.
Is it possible to apply a thin layer with a brush so that the resin regains its glow? I do not want to pour another 7 kilos (the table top is probably more expensive than the same one made of granite).
Or maybe grind and polish? I don't want to get into costs and do a terrible job.

Hello.
Oh, you had to read and check first.
The resin that immediately looks like jelly has the wrong hardener maybe too "fast", the use of a heat gun is a curiosity! I do not recommend, the temperature activates and speeds up the reactions, but the temperature should be uniform throughout the mass, not pointwise, it may cause uneven hardening and "patterns"
As for the top made, you can consider sanding, starting with 400 paper and ending with even 1200, then the resin will even shine, and if there is no difference in height, you will probably not even see the connection point of the added layer.
As for painting, this is the solution, a thin layer of resin will even the surfaces (pre-polished). Hope you used approved products for contact with food.
Greetings.

The resin in the vessel was liquid, but when poured onto the table top, it seemed to react with the previous layer and dragged on.
I poured Epidian deco on all of this, i.e. a product for countertops, tables, etc.
If I sand the table top with e.g. 320 or 400 paper, is it better to pour resin over it again or paint it with a clear varnish for furniture or apply hard osmo wax (I saw in some video)

Hello,
I'm not an expert on countertops,
rather, I would sand the table top with 400 paper, then 600 and 800, up to 1200, depending on the effect you want to achieve,
further, if the effect is insufficient, you can apply another layer of resin, but even if varnish or use an appropriate varnish, it rather depends on your skills and the availability of materials,
greetings

At 1200 it will be dull.

You have to go even further on water 2000 4000 and 5000
Finally, a felt disc for an angle grinder and spray the appropriate grit with polishing paste.

Out of curiosity, I would like to ask you to remove the tabletop ...