I might be wrong, but wouldn't yellowing be a concern with this product?
I was always under the impression that 2PAC was the only way to go or others have had some success with this if you don't want to spray:
https://www.amazon.com/KBS-Coatings-8404-DiamondFinish-Clear/dp/B00DMIDEMS/ref=asc_df_B00DMIDEMS/