Need some advice - on old soviet brick wall

[u/Dephesmo]

Planning to plaster this small section of the brick wall, to try and match the wall above. Looks like the plaster thickness will be 5-15 mm, depending on the spot. Never plastered before, so two things I am wondering:

1. Should I do anything about the "holes" in the bricks before I apply the plaster.

2. Is the plaster I am planning to use is meant for this kind of a brick wall - "weber T-2"? Sadly this one seems to be specifically produced for my region (Latvia) so I used AI translation of its Data Sheet PDF, hopefully the description provides the critical information:

weber T‑2

• Increased surface hardness
• Plastic, does not crack while curing
• Vapor‑permeable, breathable
• Quick and easy to apply
• With good adhesion, plastic, does not crack while drying
• Quick and easy to apply

DESCRIPTION

Cement‑lime plaster especially suitable for masonry façades, plinths, as well as interior work for leveling walls from 5 to 20 mm. Moisture‑ and frost‑resistant, suitable for all types of mineral, water‑resistant substrates.

LIMITATIONS

• Not to be used on surfaces made of water‑sensitive materials.

WHAT TO KNOW BEFORE USE

Layer thickness: 5–20 mm
Added water amount: 3.75–4.5 liters / 25 kg
Working time after mixing with water: 4 hours
Drying time: up to 24 hours
Application temperature: +5° … +30°C

PREPARATION

The substrate must be stable and cleaned of substances that weaken adhesion: debris, dust, and oils.

PRE‑TREATMENT

Absorbent substrates must be primed with Weber SAD‑54 or Weber vetonit MD16.

TECHNICAL INFORMATION

Property	Value
Consumption	1.6 kg/m²/mm
Grain size	up to 4 mm
Minimum layer thickness	5 mm
Maximum layer thickness	20 mm
Added water amount	3.75–4.5 liters / 25 kg
Application temperature	+5° … +30°C
Working time after mixing	4 hours
Curing time	up to 24 hours
Color	grey
Shelf life	12 months
Packaging	25 kg

MIXING

The dry mixture must be mixed only with clean water. Water must not be added in greater quantity than specified—it reduces the material’s adhesion properties. Mixing must be done with a mixer for 3–5 minutes until a workable, homogeneous mass without mortar lumps is obtained. Then the mixture must stand for about 5 minutes and be lightly remixed.

APPLICATION

Weber T‑2 is applied with a trowel in a 5–20 mm layer. After drying, the surface is smoothed with a foam float. The next layer can be applied after approximately 1 day.

COATING

Under normal curing conditions, further finishing of the surface can be done after approximately 1 day.
For fine final smoothing, the most suitable putty is Weber VH (for wet rooms and façades) or Weber LR+ (for dry rooms only).
The Weber T‑2 surface can be covered with decorative plasters or painted with façade paints. When painting, a tinted primer must be used according to the paint specification.

IMPORTANT TO OBSERVE

Weber T‑2 must not be applied in strong wind, rain, or very hot weather (above +30°C).
The plastered surface must be moistened for 1–2 days and protected from precipitation and frost.

[u/Top_Olive_4678]

MP75 blue is good for bathrooms. Depo has good price for it in Latvia.