I just watched a video by Simon Gawesworth on cleaning and dressing floating fly lines.
The final process was dressing the line with "Rio's Agent X Line Dressing."
I've been using "AmorAll" for over 30 years and have been told it destroys the finish?
I still have these useable fly lines with no signs of deterioration.

Does anyone have another substitute for Rio's Agent X Line Dressing?

p.s. I also use "Minwax Polycrylic Water Based Satin Finish" for head cement which seems to be identical to "Loon's Water Based Head Cement".

The above substitutes are a fraction of the cost of Rio's and Loon's product and all work quite admirably.