Painting over varnish

[0Floz0]

Hi

Appreciate this has been asked numerous times. I’ve read the threads but a lot of them are over 10 years old. I’m hoping there are some easier methods now.

I’ve got some window sills and handrails to paint over. They’re varnished in finish. The window sills I’m fine with sanding down. I’ve got a belt sander, orbital sander and a mouse sander.

However, the handrails are cylindrical and trying to sand them down feels like it’ll be really annoying and time consuming.

I’m going to repaint it in crown quick dry satinwood paint which is water based. I’ve got zinsser 123 and crown quick dry undercoat. Would either or both of these be fine to cover over rather than sanding them down?

Also, with it being water based. Is it worth putting a lacquer over the top to stop the paint becoming worn and dirty easily. I assume I can’t really clean a water based paint that often.

Thanks

 

[Wayners]

Clean and sand.
Zinsser BIN. Sticks to varnish.
Then waterbased underground or zinsser 123.
Use an alkid like crown fast flow vs an acrylic as this will resist skin oils.
Other option is to cover the satin you have with something like rocktop to protect paint from skin oil

 

[0Floz0]

Clean and sand.
Zinsser BIN. Sticks to varnish.
Then waterbased underground or zinsser 123.
Use an alkid like crown fast flow vs an acrylic as this will resist skin oils.
Other option is to cover the satin you have with something like rocktop to protect paint from skin oil

Thanks Wayners. Maybe I misunderstand what zinsser 123 does. I assumed it operated in a similar manner to bin but 123 being water based and bin being a shellac?

The paint I’ve been using for my skirting boards is crown trade fast flow quick dry satin. I had tried coating it before but it’s gone dirty really quickly from skin oils.

Any tips for sanding something cylindrical? What grit would you use?

 

[opps]

I use these kind of pads for sanding spindles

Contour Sanding Pads

Perfect results require proper preparation so, if you're prepping contoured surfaces like mouldings, pipes and fittings, choose these sanding pads. You'll find fine, medium and coarse grades in the pack. You can use these contour pads prior to applying primers, lacquers and finishing coats, and...

www.toolstation.com

Better quality ones are available.

Hermes Webrax Hand Pad

A non-woven web of nylon fibres on which selected aluminium oxide or silicon carbide grains are firmly bonded by resin. It has many advantages over the traditional sheet abrasive. Being an open web it is not prone to clogging - dust or waste passes...

www.axminstertools.com