In a dissenting opinion, you <strong class=`bbc`>should[/b] use AIO.
The reason is this; it acts as a boundry layyer between your paint surface and the SG. If there are any small imperfections, then it will take care of them for you and lastly, it does offer some additional protection, as the label says (I`m paraphrasing here) "that additional coats will provide another layer of acrylic." Not only that, but the AIO will make your paint feel like melted butter and will be ready for several coats of SG.
I look at the Klasse products as a system and apply it as such. Of course, everyone has their own methods and reasons, but since you`re working from such a wonderful point in the life of your car (ie: virgin paint) that I think that you`d want to be aware of all your choices.
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