Painting over a bright mural

3 Aug 2005
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United Kingdom
Hi, i have a very large and bright mural on one wall in my sons bedroom.

I would like to know what i can seal this with before painting over it so stop the colours bleeding through the new paint (magnolia). Would an oil based undercoat do this?

The mural is made up of red, orange, yellow, green, blue & purple with a black marker pen outline!!
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Yes, oil base undercoat will do the trick, make sure every bit is covered though.
and you might hide it better if you put on a coat of grey, rather than just white-ish, before your finish colour.
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If they were done in ordinary emulsion then theres no reason they should bleed through...if they were poster paint then yes they will need sealing

You mnetioned the lines..done with a black marker pen..this my bleed throung oil based undercoat suggest you give the lines a coat of white knotting (often called styptic knotting) first
Dulux Stain Block Plus is great for covering over marker pens but it WILL need two or three coats.
An update:

2 coats of Crown (it was on offer, making it cheaper than Homebase's own brand) white oil based undercoat and the mural is completely covered and the black marker pen lines are no longer bleeding through - result.

Thanks for all the input guys ;)
also i find a product called BIN from zinsser very good at stopping stains

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