Sanding in grooves - Doors and skirting boards

[NirvanaFan]

I'm painting over oil based gloss with water based satin on my doors and skirtings and I read I was supposed to key up the surface, but I'm having an absolute nightmare of a time and it's literally just taken me hours to key up one side of a door and the skirting boards in a smallish bedroom.

The main issue is all the grooves and contours that are difficult to get into with sandpaper (I've been using 120 grit) without ruining them. I've also tried using an angled sanding block and while it helps a bit, I feel like they get wrecked quickly and I have an entire flat still to do.

Does anyone have any ideas or recommendations for something I can use? I feel like this job shouldn't take as long as it is.

 

[Wayners]

Sponge pads used wet and wet and dry paper used wet.
You only need to rub a bit to create a key so maybe you are doing to much. Would take me under an hour by hand for a medium room.
If you remove any sandy surface grit in old gloss that's all you need to do.
Use zinsser paint surface cleaner.
Undercoat and gloss.
If old gloss is good?
With products like zinsser BIN you don't need to rub down old gloss as it's a great adhesion primer. One thin coat is good enough.
Then one of acrylic primer undercoat to make white.
Then top coats of whatever.

 

[NirvanaFan]

Cheers @Wayners

I probably am sanding too much. I read I was supposed to just take the shine off but I swear I can sand away for ages and it still looks shiny

I'll give the sponge pads and wet and dry pads a bash. Which ones do you use? I saw these ProDec ones in Wickes and thought they might be decent.

 

[Wayners]

Yeah.
That will do.
Wet paper is dustless and very quickly takes off the shine.
I recommend because I think that will get you on the right path.
Wrap around something like wood or something to get in groves.
Maybe use some dry paper as well.
Crack on

 

[Odds]

You could use something like a pencil or a nail file to wrap the s.paper and support the sanding til you get into the groove.

 

[opps]

You could use something like a pencil or a nail file to wrap the s.paper and support the sanding til you get into the groove.

I often use aluminium door touch plates with the paper glued to them. Additionally, when required, I will wrap paper around wooden dowels/etc.