After reading about decal prep & application on slot car forums and very helpful info from Wixwacing i have embarked on doing a few re-livieries.
The decals arrived this week from Pattos and the instruction sheet states that a product like FUTURE floor polish be used on the decals before application.
I also asked about alternatives to this product which seems to be very easily available to our US friends, but seems non existent here.
Patto sent me a PDF that states alternatives that do the same thing with the same end result.
One of which is Pascoes Long Life floor polish, which i found at the local supermarket this morning for $5 for 500ml.
I will give it a go on some scrap part of the decal sheet and see how it goes.
This sort of stuff seems popular because of its self levelling properties after applied - no lumpy bits - sounds good for a novice like me as opposed to spray clear - which i am a bit challenged with at the moment.