Sealing poster paints on bare wood...

frankus

Not a guitar, but a shield at Warwick castle - the youngest painted it in the shoppe and it needs sealing...

can I use acryllic sealer like plastikote? the last thing I want is to damage the art work

advice, thankyou please

GSPBASSES

Most art shops sell sealers for poster paint.

Corvus

Normal rattle-can clear should be fine. Don't know about Plastikote but I'd use clear as sold by H*lfords & similar - standard 1k acrylic clear, just cos it's a known quantity to me. Stand the can in warm water for a while - gives a bit better spray pressure. 'Mist' the first coat so's not to flood it with solvent & lacquer - hold the can a bit away and kind of dust it on. After 5 mins put on a thinnish but 'wet' coat on. Another 10 mins or so and another wet coat, that should do it.
Don't go mad with lots of coats or thick wet ones, 1k can crack & crazy-pave then.

Water-based paint, like nursery skool powder-in-water type stuff, will take clearcoats fine. Water-based acrylics (like warhammer and some hobby paints) do as well, but they can dissolve in solvent - the mist coat thing handles that. It's also sometimes called a "gripper" cos the first wet coat holds on better.

JookyChap

It's tricky as there are different types of poster paints. With most a light spray with an acrylic like Krylon should work OK though - I've used THIS on poster and water colours before and it has been fine. A lot of people use hairspray as it is basically the same stuff and a lot cheaper.

If you aren't bothered about the finish being hard, just waterproof, pure beeswax should work. Initially it will change the colour a little but as it dries it should go back to normal. You can normally get it as a 'Brushing Wax' in B&Q or wherever and it looks like hummus - wipe it on thinly, leave it 20 minutes then wipe it off again.

All of them though, do the usual try-on-a-bit-that-you-don't-care-about first thing.

frankus

thanks @Corvus

frankus

thanks chaps ... I'll investigate tonight or tomorrow.

ThePrettyDamned

I always used hairspray at school, assuming you're not after a thick finish anyway

JookyChap

ThePrettyDamned said:

I always used hairspray at school

man, times have changed since I went...