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SI found some old Tins of Airfix and Humbrol Paints

BillMC

6 posts

Unfortunately the paints have went hard - is there anything I can add to them that will liquidfy them? Such as thinners maybe?

Ratch

3798 posts


Community Moderator

I presume these are enamels.

Owner of the Airfix Tribute Forum https://www.tapatalk.com/groups/airfixtributeforum/index.php

Paul Brown

1437 posts


Community Moderator

Probably not worth trying to revive them but you could try Mr Color Replenishing Agent.

 

zuludog

28 posts

It depends on how hard they are - if they're just a bit thick you could thin them with white spirit or enamel thinners, but it could be hard work as the paints had quite a lot of sediment/pigment even when they were new.

If they are very thick they will need not so much stirring as first breaking up with a steel rod or a small screwdriver, followed by a thorough and prolonged stirring & mixing

 

If they are very hard then I'm afraid there's nothing much you can do except to throw them out

If you want to re-use a few tins for your own mixtures you can scrape out the sediment and clean them out with paint stripper then white spirit

 

I don't know the technical explanation, but as the solvent evaporates the paint will become thicker, but eventually there will be a point of no return where you can't recover them, and you just have to admit defeat

 

If you do manage to recover a few I would try them on scrap before using them for any proper modelling

 

However, if the tins are well sealed and don't dry up the paint has a very long shelf life

A break of many years due to work & family means that I'm a returnee, and some of my paints are in good condition even though they've been stored since the 1980s, possibly longer

BillMC

6 posts

@Ratch

I presume these are enamels.

Yes they are.

Ratch

3798 posts


Community Moderator

I never had great success trying to restore enamels. I've tried with white spirit in the past. Maybe toluene or M.E.K. would do a better job.

Owner of the Airfix Tribute Forum https://www.tapatalk.com/groups/airfixtributeforum/index.php

Paul Brown

1437 posts


Community Moderator

You need a very hot thinner to break down the pigment. Even if you can get the hardened pigment back into solution it's likely to be very grainy, with poor adhesion - I can tell you that from personal experience. The GS replenishing agent is a very hot thinner, plus it has a resin binder added so that the revived paint still sticks. It's designed for acrylics and I have no idea if it will work with enamels. My experience with enamel is that if it's hard in the tinlet, then it's only fit for the bin.

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