Apply painter’s tape to define two nested arch shapes in the center of the canvas. Mix deep terracotta acrylic paint into your spackle for the large outer arch, and a peach tint for the inner one. Apply the textured terracotta spackle first using a palette knife for the outer border. Apply the smoother, lighter peach compound to the inner arch, slightly overlapping the terracotta at the bottom junction. Use a clean palette knife to gently blend the interface, feathering the lighter color into the dark to achieve a seamless, textured ombré transition.
3. Sage Green Arched Relief and Floating Shelf

How to Create
Combine sculpture and function by incorporating a functional “floating” element within a spackle relief. This design features a wide, serene sage green spackle arch background, characterized by horizontal palette knife sweeps. The flat base of the arch provides the support line for a lightweight decorative element or a tiny functional wooden block “shelf,” making the art piece truly multi-dimensional.