Applying varnish, paint, or seal your structure.
Treating the wood against the elements is a must, especially if the structure will be outdoors. Even if you're building indoor the structure for indoor use, finishing it will be a safeguard against everyday wear and tear, and beautify the structure. Almost any varnish, stain, or paint will work just fine for stairs. You can also use non-slip paint or put non-slip adhesive paint on structure.
Treating the wood against the elements, especially if the structure will be outdoors. Even if you're building indoor the structure for indoor use, finishing it will be a safeguard against everyday wear and tear, and beautify the structure. Almost any varnish, stain, or paint will work just fine for stairs. You can also use non-slip paint or put non-slip adhesive paint on structure.