Revisamos la señalización del camerino.

Yes — revisamos can mean either:

• present: we review / we check
• preterite (simple past): we reviewed / we checked

That happens because for regular -ar verbs, the nosotros form is the same in the present and the preterite.

So:

• revisamos = present or past
• context tells you which one is meant

For example:

• Cada día revisamos la señalización. = present, habitual
• Ayer revisamos la señalización. = past

Spanish often drops subject pronouns because the verb ending already tells you who the subject is.

• revisamos already shows we

So Nosotros revisamos la señalización del camerino is possible, but Revisamos la señalización del camerino is more natural unless you want emphasis or contrast.

For example:

• Nosotros revisamos la señalización, no ellos.
  Here nosotros is used for emphasis.

Revisar usually means to check, to inspect, to review, or to go over.

In this sentence, it most naturally means something like:

• to check
• to inspect
• to review

It does not usually mean to revise in the English sense of rewriting a text, even though the words look related. That resemblance can be misleading.

So in many contexts, revisar is closer to:

• checking something
• looking something over
• making sure something is correct

Señalización usually refers to signage as a system or set of signs, markings, or wayfinding elements.

It is more abstract or collective than señales.

• señalización = signage / signposting / marking system
• señales = signs

So:

• Revisamos la señalización del camerino suggests checking the overall signage or markings related to the dressing room.
• Revisamos las señales del camerino would focus more directly on the individual signs.

In Spain, señalización is very common in formal, technical, safety, or workplace contexts.

Because de + el contracts to del.

So:

• de + el camerino → del camerino

This contraction is mandatory in standard Spanish.

The only common exception is when El is part of a proper name, such as:

• de El Escorial

But with ordinary nouns, you use del.

Because the nouns have different grammatical genders:

• la señalización → feminine
• el camerino → masculine

A few useful clues:

• nouns ending in -ción are usually feminine
  so señalización is feminine
• camerino ends in -o, so it is typically masculine

That is why the articles are:

• la for señalización
• el for camerino, which becomes del after de

In Spain, camerino usually means a dressing room, especially for performers, actors, presenters, or people backstage.

It is not usually the normal word for a shop changing room. In that context, Spanish from Spain more often uses:

• probador = fitting room / changing room in a shop

So camerino strongly suggests a backstage or performance-related dressing room.

Spanish uses definite articles more often than English does.

Here, the sentence refers to a specific thing:

• the signage
• of the dressing room

Even when English might sometimes sound fine without an article in certain contexts, Spanish often prefers one.

So la señalización del camerino sounds natural because it points to a specific set of signage associated with a specific dressing room.

Yes. It is a very normal Spanish sentence structure:

• Revisamos = verb
• la señalización del camerino = direct object

Spanish often allows flexible word order, but this is the most straightforward and neutral order here.

You could say Nosotros revisamos la señalización del camerino, but that adds the subject for emphasis. The shorter version is more natural in many situations.

Yes, but the nuance changes a little:

• revisamos = we checked / reviewed / went over
• comprobamos = we verified / checked to confirm
• inspeccionamos = we inspected

So revisamos is a fairly broad, natural choice.
If you want a more formal or technical tone, inspeccionamos may sound stronger.
If you want the idea of confirming that something is correct, comprobamos may fit better.

If you want to make the time clearer, you can add context or choose a different tense.

For clearer present meaning:

• Ahora revisamos la señalización del camerino.
• Solemos revisar la señalización del camerino.

For clearer past meaning:

• Ayer revisamos la señalización del camerino.
• Hemos revisado la señalización del camerino.
• Revisamos la señalización del camerino esta mañana.

In Spain, hemos revisado is often common in conversation for recent past events, though revisamos is also perfectly correct depending on context and style.