Check all the nails in their places and sit as it should.

With old floors of trouble and work more. It is necessary to remove the old paint. This can be done with an iron spatula. Check all the nails in their places and sit as it should. If the nails have crawled out, then they need to be driven back. Slots and cracks require special attention as it goes through precious heat. From cracks and cracks we remove the whole. We primed all the hollows and flashes and let it dry, then be sealed with putty. If the gap is large, then we fill it with bags and then put it up. We wait for complete drying. Next, we clean the floors with a grinding machine or other available ways (the main thing is to achieve a flat surface). Carefully vacuum the surface and you can start painting.