Don't know if they have switched the descriptions of the products or the head picture of it. But the red compression sprayer from Kwazar is the acid resistant seals in it. This is not the same with the Kwazar spray bottles offered here.
Kwazar Venus Super HD Compression Sprayer
Kwazar Venus Super Compression Sprayer Pro
The Black Compression Sprayer has the seals that is resistant to solvent and petroleum and oil based products.
They have also a Dark Blue Compression Sprayer that has seals for the high alkaline based degreaser and APC.
The Light Blue Compression Sprayer has the seals that is more for the generic based products from slightly acidic to slightly alkaline based products.
These colors is also what they have in the more pro spray bottles. The ones offered on AGO is the generic seals.
Iron remover products needs to be haveing a metall free spray handle. The Red and Light Blue Compression Sprayer can be used with iron remover. But then it's important to have empty the sprayer head and also flush it with water to being holding up for a longer time. I useally take the spray head that I think was great from an iron remover spray bottle. There are different kind of seals that suits different kind of chemicals.
With the Red Compression Sprayer from Kwazar for useing Meguiars Wheel Brightener D140 is a great choice. When you do the last wheel I finish of with holding the sprayer upside down and spray until it just comes mostly air. Then pull the trigger on the pressure release button. This keeps them going for a long time before the seals goes out. And there are new seals to buy in spare parts kit to these.
So look up what kind of seals it is in the spray handle and what they are resistant against for chemicals. With the sprayer you buy. There is no sprayer head that is resistant to all kind of chemicals in the extreme range of ph levels and solvents. If it's just chemical resistant it's the viton seals in the quality that you get in the Kwazar spray bottles here on AGO and the Kwazar Foamer light blue.
Hope it helps you a little in your search.