Alisei a superfície com o teque.

Alisei is the 1st person singular form of the verb alisar in the pretérito perfeito simples.

So it means:

• I smoothed
• I made smooth
• I flattened/evened out (depending on context)

In European Portuguese, this tense normally refers to a completed action in the past.

Portuguese often omits the subject pronoun when the verb ending already makes the subject clear.

• Alisei already means I smoothed
• So Eu alisei a superfície com o teque is also correct, but eu is unnecessary unless you want emphasis or contrast

For example:

• Eu alisei a superfície, não foi ele.
  I smoothed the surface, not him.

Yes, superfície is a feminine noun, so it takes a in the singular:

• a superfície
• as superfícies

This is a good reminder that noun gender in Portuguese is not always obvious from the ending. Even though superfície ends in -e, it is still feminine.

Here, a superfície means the surface as a specific object being worked on.

Com o teque tells you the instrument used to do the action.

So:

• alisar a superfície = to smooth the surface
• com o teque = with the teque / using the teque

This is a very common use of com in Portuguese: it can show the tool, instrument, or means used to perform an action.

Teque is a specialized tool name, especially in crafts such as ceramics or modelling. It refers to a small tool used for shaping, scraping, or smoothing a surface, often clay.

So in this sentence, o teque is probably the tool used to smooth that surface.

Because it is a fairly technical word, learners may not see it often outside craft-related contexts.

Because in standard Portuguese, com normally does not contract with the definite article in writing.

So you write:

• com o
• com a
• com os
• com as

This is different from prepositions such as:

• de + o = do
• em + o = no
• a + o = ao

So com o teque is the normal standard form.

Yes. That is perfectly possible.

• Alisei a superfície com o teque = I smoothed the surface with the teque
• Alisei a superfície usando o teque = I smoothed the surface using the teque

The version with com is shorter and very natural.
The version with usando is slightly more explicit.

In normal Portuguese, using the article here sounds more natural:

• com o teque

That usually suggests a specific tool known in the context.

If you said com teque, it would sound less natural in a full everyday sentence, although article-less wording can sometimes appear in notes, instructions, or very technical writing.

For most learners, com o teque is the safer and more idiomatic choice.

The word is stressed on fí:

• su-per-FÍ-cie

The accent in í shows where the stress falls.

For a learner, the important point is:

• the stress is not at the beginning
• the stressed syllable is fí

In European Portuguese, the final -e is usually very weak.

The sentence uses a very normal order:

• Alisei = verb
• a superfície = direct object
• com o teque = prepositional phrase showing the instrument

You can change the order for emphasis, for example:

• Com o teque, alisei a superfície.

That still means the same thing, but it gives more prominence to the tool used.

The original order is the most neutral one.