Okay, I think this is a more definitive answer to the question.
Spoke with a gentleman at Volvo-Penta Canada today. He said, in Canada, they can not legally require us to attend to a Volvo-Penta dealership to have warranty work or maintenance / service done. Although they prefer that we see a VP dealer, he said they can not legally deny a warranty issue because we did the work ourself or had another shop do it.
He said to safeguard ourselves, ensure everything is documented in accordance with the VP service manual(s). He said if it was him he would also use Volvo products to make any warranty claims more straight forward.
He also stated that the 50 hour service (First Service Inspection - FSI) is a guideline and 10-15 hours outside of the 50 hours is acceptable. They just don't want people running up 200 hours, having an issue and then finding out that the issue could have been corrected if the First Service Inspection had been done earlier.
He was very 'matter of fact' about using the correct coolants. He said that the colour alone is not indicative of the proper coolant needed and that many coolants are not compatible. This is one VP part/product I will be using and changing religiously. I think I mentioned it in another post but I have a friend who's Yanmar heat exchanger (in his R21) went south due to improper coolant. It was a huge bill!
I will get the 'FSI' done by a dealer and then after that document everything that I do myself.