Urgent! Help! Draw acrylic pictures on the stone pier, if you protect it from the weather?

In order to protect your works, you can take the following measures:

Use acrylic pigments specially designed for outdoor use. These pigments usually have strong weather resistance and ultraviolet resistance.

After painting, paint the work with varnish (gloss or matte). This varnish can provide a protective layer for acrylic painting, which can resist ultraviolet rays, moisture and pollutants. Make sure to spray in a dry and dust-free environment and follow the product instructions.

If you are worried that your work will be affected by bad weather, you can consider using other more weather-resistant materials to create, such as using weather-resistant paint or tiles to paint.