Wall finish
Dust, loose paint, heavy texture and uneven patches can interfere with contact or make surface irregularities more noticeable. Product instructions explain the conditions the adhesive is designed for.
Self-adhesive, still detail-sensitive
The convenience is in the backing. The finished result still depends on a suitable surface, a straight start and steady alignment from one panel to the next.

Three things worth checking
Dust, loose paint, heavy texture and uneven patches can interfere with contact or make surface irregularities more noticeable. Product instructions explain the conditions the adhesive is designed for.
Peel-and-stick material can be repositioned only within the limits of its adhesive and manufacturer guidance. A measured starting line helps keep the design plumb and the pattern consistent.
Roll width, pattern repeat and the shape of the wall affect how panels meet around corners and openings. Keep the product name or link handy if you have chosen a covering.

The easiest next step
Call and explain what you have in mind. A product name, wall dimensions or a few photos may be useful later, but none is a prerequisite for an initial conversation. If you are still comparing materials, say so.
Ask whether an on-site assessment or measurements can be arranged if seeing the wall would help. A visit is by request and subject to confirmation.
Read what to consider before installation