Duragloss #921 Quick Detail Spray Questions

Sorry, it makes all the sense to me now. When Sparkie gave the 75/25 percentages, I wasn't thinking and mistook the #951Aquawax as #921.

So now I'm thinking one should get #521 instead of #921 as it will have more cleaning power and more protection. Am I correct? The only thing that gets me is why they don't advertise #521 for cars as well, or if it's better why does #921 even exist.
 
Sorry, it makes all the sense to me now. When Sparkie gave the 75/25 percentages, I wasn't thinking and mistook the #951Aquawax as #921.

So now I'm thinking one should get #521 instead of #921 as it will have more cleaning power and more protection. Am I correct? The only thing that gets me is why they don't advertise #521 for cars as well, or if it's better why does #921 even exist.
Personally, I would go with #921 as it's specifiaclly designed for automotive paint. You do bring up a good point, though. Call duragloss and ask them.
 
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