Painting old room questions

[Nathanlowe25]

Morning,

Looking for a bit of advice.

Got a crack (pic areached) across my ceiling and wondering which is the best way to repair ?
- scrape, fill, scrim tape, filler over the tape
- scrim tape, filler over the tape

Additionally, the walls are very old and after giving it a good clean, fill and sand where required, would I be better doing a:
- mist coat
- white undercoat (leyland trade brilliant Matt white)

In terms of the order of doing things I’m thinking:
- remove wall plugs, clean walls with sugar soap, fill holes / cracks, sand the lot, paint ceiling, walls, skirtings

Thank you

Nathan

 

[DiyNutJob]

You know the conventional ideas already. If you need something new and exotic, I can suggest one. Dig out the crack slightly, sand flat, and fill with hybrid polymer sealant. Then scrape off the excess to be flat with the ceiling. Lastly, prime and paint. This method won't give you a bump like the conventional method would. A denser sealant has less shrinkage and works better for this. The sealant is not brittle and unlikely to crack open by the movements that caused cracking. This is bleeding edge stuff, and its long term performance is unknown.