How to paint T&G wooden walls

[Pineman]

I want to paint some T&G walls with an oil-based eggshell finish. The walls look to have a coat of varnish on them. My questions are:
1. As the wood is varnished, I take it I don't need to apply knotting?
2. Do I need to sand the wood first?
3. Do I need a primer?
4. Do I need an undercoat and topcoat or would 2 topcoats be enough?

I've spoken to someone in my local paint shop who said I should be OK with just an undercoat, a light sanding and then one topcoat.

Any thoughts very welcome.

 

[Zampa]

1. As the wood is varnished, I take it I don't need to apply knotting?

Yes..varnish doesnt seal knots..they just dont show up.

2. Do I need to sand the wood first?

Yes...always a good diea to provide a key

3. Do I need a primer?

Yes..paint chips off varnish very easy...use zinseer bin or dulux super grip

4. Do I need an undercoat and topcoat or would 2 topcoats be enough?

Eggshell is self undercoating..two coats should do

I've spoken to someone in my local paint shop who said I should be OK with just an undercoat, a light sanding and then one topcoat.

Hes wrong

 

[Pineman]

Thank you Zampa.

Just one thing, do you mean yes I do need to use knotting or yes I don't?

 

[Zampa]

yep..you do need the knotting

 

[Pineman]

OK. Thank you again.