Paragons website states not to make the mistake of using other thinners.. specifically mentioning cellulose thinners. Their hazard sheets says PT8 is solvent Naphtha (petroleum) which I interpret as a subset of oil distillation. Naphtha isn't really specific and might include things like white spirit or turps substitute.
Is it worth risking disappointment? If going to try it then obviously on some scrap first.

Any oil based enamel paint is usually thinned with White Spirit and also used to clean any brushes or spray gear.

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It appears to be white spirit, if you read paragons data sheet it gives an ec no. Which if you google it seems to come up with many references to white spirit, Barretine White Spirit being one of them, I don’t know how exactly the number defines a substance but as it’s a readily available material it could be worth a try. The downside is what the long term effect will be and whether a strip and repaint would be more annoying than getting the recommended stuffin a few days.

Mike

Edited By Mike Poole on 13/03/2019 12:01:00

Natural oils are rarely used today, most enamels are synthetic.

When I worked in car paint it was (S) for synthetic and (C) for cellulose, or 'you can put (S)alt on (C)hips but not (C)hips on (S)alt'

The problem with cellulose (apart from what it does to the environment) is that you never know what is on there already.

Also if you are applying with a spraygun synthetic enamel is a very different technique to using cellulose. Runs are far more likely if you lay it on too heavy. Denibbing files (eg Machine Mart 040811450 or 040811449 for example) are your friends if it happens.

Edited By Nick Clarke 3 on 13/03/2019 14:56:32

Synthetic Enamel for cars (legally only for machines now – as in lathes ) has a 'fast' thinner for spraying, still available from suppliers by the litre.

Surprised anyone will ship thinners by a non specialist carrier given the explosive nature if leaks occur.