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You're supposed to sand the existing gloss down before painting. What's the best way to do this? My wife has read that you need to sand until it's not shiny, but this takes forever and there's millions of nooks and crannies.
I thought it just needed a quick rub down not a full sand. Is there a tool or technique that makes it go quicker? Is wire wool easier to use?
Don't use wire wool if you miss any of it after clean up it will rust with water based paint.
Scotch bright pads are your friend the green ones
pk13 +1
If you don't mind a satin finish then Zinsser All-Coat Exterior is the easiest paint AND it doesn't need prep, although I would wash the surface to get rid of dirt and grease residues https://www.zinsseruk.com/product/allcoat-exterior/
Elbow grease is the cheapest product 🙂
ooorrrrr if you have stacks to do, it's already badly painted and it's suspect lead paint...and if you are getting huge quotes from decorators.
festool sander and extractor....amazing bit of kit.
festool sander and extractor….amazing bit of kit.
You're putting an awful lot of faith in the extraction if you suspect any dust will contain lead. I'd do some pretty thorough research before following that advice (and I own a rotex and cleantec). If you suspect lead you should really be sanding wet.
How much you need to sand depends a fair bit on what you're going to paint on next. Shellac based primers such as Smith and Rodger Blockade (available from Dulux centres) or Zinser BIN will adhere to pretty much any previous paint / varnish. Shellac will adhere to pretty much any substrate and pretty much any paint will adhere to it - so its particularly good where you're painting modern water based paints over older oil based ones
so if you do that you only really need to sand to take away any lumps and bumps, make sure its clean and to help make sure whatever you're painting on to is itself well adhered.
You just need to knock the shine back a bit to give the new paint something to hold on to. Appreciate this is easy with big flat surfaces but intricate mouldings etc, furgeddaboudit.
I was in the paint shop recently and saw a product called Kurd Kutter Gloss Off. I was totally cynical but had a punt as it was only £6. Got to say I was impressed. You use a fine sanding pad or green scotch thing and just give everything a good rub, as if you’re cleaning or degreasing it. Come back to it a bit later and you can see it’s dulled the finish.
Who knows what evil chemicals it contains though. Get rubbered up obvs.
My guess would be that it's just an adhesion thing. Old paint tends to be quite hard to paint over. Gloss particularly so. It doesn't need to be perfect. I'd just get some sand paper and do the best you can. Wipe it down with a damp cloth and let it dry afterwards.
In my experience it didn't take much to massively improve adhesion. Interior gloss has a very easy life so it's unlikely you'll hit any problems either way.
I've used Dulux super grip primer on old gloss work throughout the house for the last 12 years. No peeling or chipping in that period from whatever top <span style="font-size: 0.8rem;">coat I put on and doesn't leave brush lines. Takes whatever paint you put on top very well. I only give a cursory rub down of the existing gloss with nylon abrasive to key the high points a bit.</span>
Also works on varnished wood, metalwork, etc.
re sanding, on my experience the festool extractors and sanders are excellent. there was no dust on any surfaces (stuff like mirrors show it up)
if you are super paranoid, yes wet sanding or some sort of chemical removal but it's bloody messy and you may have to replace carpets too and repaint walls if you are doing any architrave and rails.
anyways the idea is you are keying the surface and not taking it all off, so a quick pass on a sander is often enough
The Mirka sanders with dust extractor are great, and due to the Abranet sandpaper you use with them create practically no dust. But...they're so expensive I wouldn't recommend fhem for DIY stuff. Mirka Goldflex soft is a foam backed sandpaper on a roll which gets into the little dents in your skirting a lot better than rigid sandpaper. It's also great for architraves and door panels etc.
Biggest question here is what product are you finishing it with. If it's Dulux old fashioned solvent based gloss or satinwood then alot less is required. Zinsser universal degreaser and cleaner is the new sugarsoap and is excellent for helping paint stick.
My usual routine for applying water based paint is clean, light sand with flexible pads, apply adhesion primer ( Dulux supergrip) then paint with whatever. If you're using solvent based satinwood then no need for the adhesive primer. Bedec do a paint called MSP, the satin is great,I don't like the gloss much, this stuff can sometimes stick without and adhesive primer but that's a gamble I'm not willing to take.