Rust Converter instructions say not to apply to un-rusted metal, and to instead use primer on un-rusted areas.
Problem: there are rusty patches surrounded by un-rusted metal. Almost impossible to confine Rust Conveerter to only the rusty patches, and impossible to confine primer to only un-rusted areas.
Should I completely skip using Rust Convereter and use only Rust Encapsulator? Encapsulator instructions say it can be applied to un-rusted as well as rusted areas.
.