Surface preparation - to over-coat or not to over-coat
Surface preparation - to over-coat or not to over-coat Here the checklist I use when deciding to over-coat – 1. Do you know what the existing coating is? Is it a two-pack or single-pack coating? If you put a little bit of solvent on it does it bubble or wrinkle? If it doesn’t handle solvent well then it’s probably a single-pack coating, which means you shouldn’t waste your time over-coating with the much stronger two-pack. 2. Is the existing floor coating stuck down well or flaky? If it’s flaky then remove it. Over-coating a flaky coating could end up with both peeling off. 3. Is the existing coating stained, meaning that contamination has absorbed into the coating? This is not a good sign and if the stain is oil based then I’d remove the coating. 4. Is the existing coating...