Just my .02 but I wouldn't mix finishes. If you don't know the longevity of the Solution finish product you used I would contact the manufacturer and explain the prep work you did before applying their product and see what they recommend. (My guess is they just recommend more frequent application of their product.) Most longevity depends on prep work and type of exposure you put the cladding through. Manufacturers can't test their product with every known product out there to see if there is any long term chemical reactions so I bet any company advises to strip the cladding completely of any finishing product before applying their product.
In other words if you contacted Refinish Restorer I bet they would advise stripping the Solution Finish product off of the cladding before applying. Otherwise if it fades,peels or flakes off which product is to blame?