Painting over glossy doorframes with satinwood - best primer to avoid having to sand?

[michealangelo]

I haven't actually bought any 123 yet as still deciding whether to sand or not... though as said above, am slowly resigning myself to more sanding! I do already have the Johnstone's Aqua Guard and Aqua Guard primer though.

Hence, I just wanted to clarify that:

If not sanding, 3 coats needed: Zinsser 123 (or similar, that can stick to glossy surface), then a "regular" undercoat (Johnstone's Aqua Guard Primer), then a topcoat (Johnstone's Aqua Guard)

But if sanding, only 2 coats needed: "regular" undercoat (Johnstone's Aqua Guard Primer) , then a topcoat (Johnstone's Aqua Guard)

Well if it was me painting on a previously glossed surface I would sand the surface LIGHTLY ....just to give it a key........then zinser or similar primer , primer undercoat ......then top coat

 

[opps]

Only just seen these last few replies.

If you knew how much I've had to sand recently (after full rewire and tons of plastered chases) you'd understand why I wanted to avoid any more of it! Not just the time it takes, but the mess - however if it's just a light sand, and can do it wet, then maybe it just has to be done. Have bookmarked those contoured sanding pads

re. the open weave abranet - have been using these with a Mirka "handy sander" (connected to a Henry) for sanding large areas of plaster - have found them pretty effect at containing dust. But for door frames, the "handy sander" is too large for the small surfaces and angles etc - but is there an abranet/mirka product that would work for this?

And if I do sand - no need for the Zinsser 123, right? Just sand, primer, overcoat?

Mirka make small and large "handy sanders".

For profiles, I have an expensive linear Festool sander. You can buy sanding bases that will follow the profile of architraves etc, it will cut itself to that profile, but to be honest, it is not brilliant.