Η ξυριστική μηχανή είναι πιο βολική από το ξυράφι, αλλά μετά βάζω πάντα λοσιόν.

Yes. Η ξυριστική μηχανή literally means the shaving machine, and in everyday Greek it commonly refers to an electric shaver / electric razor.

If you want to be extra explicit, you can say η ηλεκτρική ξυριστική μηχανή. But very often ξυριστική μηχανή by itself already implies the electric kind.

By contrast, το ξυράφι means razor, usually the non-electric kind.

Because Greek nouns have grammatical gender.

• η ξυριστική μηχανή is feminine
• το ξυράφι is neuter

That means the article changes depending on the noun:

• masculine: ο
• feminine: η
• neuter: το

You need to learn each noun together with its article, because the gender affects other words too, especially adjectives.

Because the adjective has to agree with the noun it describes.

The noun here is η ξυριστική μηχανή, which is feminine singular, so the adjective must also be feminine singular:

• masculine: βολικός
• feminine: βολική
• neuter: βολικό

So:

• Η ξυριστική μηχανή είναι πιο βολική = The shaver is more convenient
• Το ξυράφι είναι πιο βολικό = The razor is more convenient

This is the standard way to form a comparison in Modern Greek:

πιο + adjective + από + noun/pronoun

So here:

• πιο βολική = more convenient
• από το ξυράφι = than the razor

Full pattern:

• Η ξυριστική μηχανή είναι πιο βολική από το ξυράφι.
• The shaver is more convenient than the razor.

This is very common and works with lots of adjectives:

• πιο ακριβός από... = more expensive than...
• πιο εύκολος από... = easier than...
• πιο γρήγορο από... = faster than...

After από, Greek normally uses the accusative.

So in principle, το ξυράφι here is in the accusative.

However, with neuter singular nouns, the nominative and accusative often look exactly the same, so you do not see any change:

• nominative: το ξυράφι
• accusative: το ξυράφι

If the noun were feminine or masculine, the accusative would often be easier to notice.

Here μετά means then or afterwards.

So:

• αλλά μετά βάζω πάντα λοσιόν = but afterwards I always put/apply lotion

This is different from μετά followed by a noun, where it means after something:

• μετά το ξύρισμα = after shaving / after the shave
• μετά τη δουλειά = after work

So in your sentence, because μετά stands on its own, it means afterwards / then.

Greek very often uses βάζω literally put where English would use apply, put on, or sometimes even wear.

So:

• βάζω λοσιόν = I apply lotion / I put on lotion
• βάζω κρέμα = I apply cream
• βάζω αντηλιακό = I put on sunscreen

This is completely natural Greek. Even though βάζω literally means put, in this kind of context it is the normal everyday verb.

Because λοσιόν here is being used in a general, non-specific sense, like a substance or product.

So:

• βάζω λοσιόν = I put on lotion / I use lotion

If you mean a specific lotion, you can use the article:

• βάζω τη λοσιόν που μου έδωσε ο γιατρός = I apply the lotion the doctor gave me

So the version without the article sounds like some lotion / lotion in general, which is very natural in this sentence.

Yes, λοσιόν is normally treated as a feminine noun: η λοσιόν.

It is a loanword, and in everyday Modern Greek it is usually indeclinable, which means the noun itself often stays the same and the article shows the grammatical role:

• nominative: η λοσιόν
• accusative: τη λοσιόν

So in your sentence, even though there is no article, the noun itself still appears as λοσιόν.

Yes, you can. Greek word order is more flexible than English word order.

In the sentence:

• μετά βάζω πάντα λοσιόν

πάντα means always, and its position is natural. But other orders are also possible:

• μετά πάντα βάζω λοσιόν
• μετά βάζω λοσιόν πάντα

These do not all sound equally neutral, though.

The most natural choices are usually:

• πάντα βάζω λοσιόν
• βάζω πάντα λοσιόν

Very roughly:

• πάντα βάζω... can emphasize the always
• βάζω πάντα... is very neutral and common

It can very naturally be understood as a general statement, even though Greek uses the definite article.

Greek often uses the definite article where English might use:

• an
• a
• or no article at all when speaking generally

So:

• Η ξυριστική μηχανή είναι πιο βολική από το ξυράφι

can mean something like:

• An electric shaver is more convenient than a razor
• or The electric shaver is more convenient than the razor, depending on context

This use of the definite article for general statements is very common in Greek.

They refer to different shaving tools:

• η ξυριστική μηχανή = electric shaver / electric razor
• το ξυράφι = razor, especially a blade razor or non-electric shaving tool

So the sentence contrasts:

• the convenience of an electric shaver with
• the need to use lotion afterwards

The idea is roughly: the shaver is more convenient than a razor, but afterwards I still always use lotion.

The letter ξ is pronounced ks, like the sound in box.

So:

• ξυριστική sounds roughly like ksee-ree-stee-KEE
• ξυράφι sounds roughly like ksee-RA-fee

A few helpful points:

• ξ = ks
• υ here sounds like ee
• the written accent shows the stressed syllable:
  • ξυριστική
  • ξυράφι

So do not try to pronounce ξ like English z. It is a clear ks sound.

No. In Greek, the adjective agrees with the grammatical gender of the noun, not with the real-world idea of the object.

Since μηχανή is feminine, the adjective must be feminine too:

• η ξυριστική μηχανή είναι πιο βολική

Even though the thing itself is an object, Greek does not switch to neuter for that reason. You follow the noun’s grammatical gender.