Hi Bob
I'm afraid there isn't any we can do about the print quality of the digital archive, the page you are referring to does have very small captions on a drak background, but I've printed it myself, and its not too bad, but I agree it is hard to read the caption.
The caption itself reads "Forum members regularly write for the magazine and support model boating events. Paul Thomason and Robert Abell, both regular forum supporters can be seen here at Haydock Park in 2014"
Your friends should be able to read Latest Posts and forum threads without being registered, but won't be able to post in the threads. They can see what you can see, as long as they are looking in the right place!
Thanks
Katy