Concept:
In painting and poster colour techniques, applying colour over an already dried layer creates layered visual effects.
This process is associated with:
• Coating
• Superimposing
• Layering
However, “wash” usually refers to a diluted transparent layer applied smoothly and uniformly, often while working wet.
Step 1: Understanding coating.
Coating means:
• Applying an additional layer over a surface
• Covering previously painted areas
Thus:
\[
A \text{ is correct}
\]
Step 2: Understanding superimposing.
Superimposing means:
• Placing one layer over another
• Applying colour over existing dry paint
Hence:
\[
B \text{ is correct}
\]
Step 3: Understanding wash.
A wash generally means:
• Thin diluted colour
• Transparent flow technique
• Smooth light application
It is not specifically defined as applying paint over a dry layer.
Therefore:
\[
C \text{ is incorrect}
\]
Step 4: Understanding laying on top of another.
This phrase directly describes layering one paint layer above another.
Hence:
\[
D \text{ is correct}
\]
Step 5: Constructing the final answer.
Correct statements:
\[
A, B, D
\]
Therefore:
\[
\boxed{(3)}
\]
Final Conclusion:
Applying poster colour over an already dry layer is associated with:
\[
\boxed{\text{Coating, Superimposing and Layering}}
\]
Hence the correct option is:
\[
\boxed{(3)\; A, B \text{ and } D \text{ only}}
\]