Rolling Perfection has had a good run. 
We are grateful to all of the folks out there who purchased the book and found it useful for improving the outcomes of their paint jobs when using the Interlux 2 part LP paint; Perfection(TM). This particular paint is no longer available. We have always noted how toxic it is due to the fact that it contains more Isocyanates than currently allowed for sale to non professionals.
We also learned late in the game that the hardener has a very short shelf life and was never available as a separate item.
In terms of a replacement paint, an Interlux rep was recently quoted on a forum ;
Perfection and Brightside were discontinued late 2023. Perfection was not replaced so we will no longer offer a two part topcoat here at Interlux. Brightside was replaced with Toplac Plus paint and Prekote Plus primer. It (Toplac Plus) is a new paint.
Our book Rolling Perfection was written specifically as a 'roller-only' technique for use with the Perfection paint, even though we have had customer feedback that it was useful for other 2 part LP paints from Epifanes to Alexseal. However; we cannot personally vouch for any crossover validity and with the discontinuation of the paint, we are a bit overdue in retiring the book.
We still have a few of the books in house that we can offer to ship (USA ONLY) while stocks last in case you have the paint and really want the book. or, you can contact us by email; info@ptwatercraft.com.