External window sill

Masonry paint

Should paint it with durable paint that for paint out door. Which they have alot different band could used.

Hi, what I would suggest is removing the lose flaky paint. If it’s a stone window sill I would always recommend putting a masonry paint on it, but if it’s shiny there’s a good chance it has an oil based gloss on it so you would either have to remove the old paint and start a fresh or you could sand it to a solid base, then fill it with a 2 pack filler and use a product like zinzer all coats, this will Adhere to the surface, I’d say 3 coats as it’s self priming, all coats is a flexible system that has proved to be a great exterior system.

Scrape any lose flaking paint. Burn off if necessary and sand to a smooth finish filling where and if required. Normally 2 coats of masonry paint would be suffice depending on brand and colour choice.

Need to paint it with masonry paint. I recommend Dulux Weathershield

Scrape any loose off sand and fill then 2 coats of masonry paint

If it has lots of layers of old paint on always best to burn it of sand and fill where required and at least two coats of massony paint for a good finish

I would remove all old paint and make good the sill with a exterior masonry filler paint f needed then 2 coats of Dulux weathershield Masonry paint.