Soften the paint first, then lift it gently. Fresh emulsion usually comes off with warm soapy water. Dried paint on ordinary glass can be lifted with a new, sharp blade held flat and kept wet. On toughened glass, don't use a blade at all: soak the paint and work it off with a soft pad.
What kind of paint is it?
Most splashes on windows are emulsion from walls and ceilings, or gloss and satin from frames, skirting and doors. Emulsion is water-based and comes off much more easily, especially if it's fresh. Gloss and oil-based paints harden and grip the glass, so they need more patience.
Knowing which you're dealing with tells you how gentle you can afford to be. Start with the mildest method and only step up if it doesn't work.
How do you get fresh emulsion off glass?
Wipe it off while it's wet with warm water and a little washing-up liquid. If it has only just dried, soak the area with a wet cloth for a few minutes and it should soften and roll off. Rinse the glass afterwards so you don't leave a smear.
Can you use a scraper blade on windows?
On ordinary float glass, carefully, yes. On toughened glass, no. That's the most important thing in this whole guide. Toughened glass, used in doors, low windows, bathrooms and most modern patio doors, can have tiny particles fused to its surface from manufacture. A blade can drag one of them across the pane and leave a long scratch.
Toughened glass usually has a small kitemark etched in one corner. If you can't see one and you're not sure, treat it as toughened.
How do you use a blade safely on ordinary glass?
Use a brand-new blade, keep the glass wet, and push in one direction only. Hold the blade almost flat against the glass, push it forward under the paint, and lift away at the end of each stroke. Never drag it back towards you, because that's when grit gets caught and scratches.
- Wet the glass with soapy water first, as a lubricant.
- Use a fresh blade; a nicked one scratches.
- Keep the blade low and push forward only.
- Rinse and check as you go.
How do you get paint off toughened glass?
Soak it, then work it off gently. Lay a cloth soaked in warm soapy water over the paint for a while to soften it. Then use a soft, non-scratch pad or your fingernail through a cloth to roll the paint off. Repeat as needed. For stubborn gloss, a product made for removing paint from glass may help, but test it on a small patch first and keep it off the frames and seals.
What about paint on uPVC frames?
uPVC marks easily, so avoid blades, scourers and strong solvents. Most emulsion comes off with warm soapy water and a soft cloth. For dried gloss on uPVC, a cleaner made for uPVC is the safest route. Strong solvents can dull or soften the surface and leave a patch that looks worse than the paint did.
What shouldn't you use?
- Wire wool and scouring pads: they scratch glass and uPVC.
- Blades on toughened glass: the risk of a long scratch is real.
- Strong solvents near seals: they can damage rubber and frame finishes.
- Dry scraping: always keep the surface wet.
When should you get someone in?
When there's a lot of it, when it's on toughened glass, or when it's on big panes like patio doors. A lot of paint splashes go with building or decorating work, so they often come with other marks too. Our hard-water and paint-splash removal starts with a test patch and an honest word about what's possible, and our after-builders clean deals with paint, mortar and dust together.