Under the same environment, different protective coatings yield different results
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The images below also show use indoors: one unit is protected with alkyd enamel, while the other is protected with epoxy enamel. The results vary depending on the device: those that have been in use for about 2 years (with alkyd enamel coating) are either difficult to clean or impossible to clean, as oil stains have penetrated deep into the surface of the coating, making cleaning extremely difficult. Additionally, signs of oil penetration have appeared on the surface of the coating after scrubbing. The other one has stains that have not penetrated the coating but remain only on the surface, making it easy to clean; it has been in use for over 10 years now.
Epoxy enamel provides better corrosion protection, effectively prevents oil stains from penetrating, is easy to clean, and has a longer service life. .
The difference is too obvious; the one below looks like it was made new
I’ve learned about it, and I’d like to ask what a medium is