I had bought my setup from here in 2013. Mooshy and now Bella Rose were/Are bar chewers. Bella is the worst. Paint easily came off and I sure wasn't at peace knowing they ate paint. Got these and replaced them. She's tried hard to get the paint off and no go! No little dents either! I noticed the bars on the new ones are a little thinner and the feel of the coating is different. So happy though Bella Rose isn't!
From Guinea Pig Cages Store: Thank you for your review! Just to clarify: You're correct, the new grids are powder coated vs. vinyl coated.They're stronger because there's more metal than coating to keep the grid/bar thickness the same. Vinyl coating requires several thick coats and can peel. Powder coating is applied electrostatically and heat cured. So we had the metal made thicker in order to keep the same gauge of the grid. Glad the new grids are working nicely, and I hope Bella found something more appetizing to chew! :)