Eggshell over gloss query

It’s need to be sanded first.

Has to be sanded first, cleaned and wiped, than he may re-apply the paint

I would definitely not paint straight over it! the result would be disastrous and you wouldn’t get a professional finish!! 1. Lightly sand the gloss. 2. Use a reputable product like Zinsser B-I-N Shellac-Based Primer. 3. Repaint with your chosen eggshell.

He should lightly sand the gloss first, then prime, then paint with eggshell. Painting eggshell straight over gloss won’t stick properly.

If gloss has already been applied to the woodwork, it should not be painted over directly with eggshell. The correct and professional approach is: • Lightly sand the gloss finish to create a proper key (no need to strip it back fully) • Clean and degrease the surface • Apply a suitable adhesion primer (such as a shellac-based or bonding primer) • Then apply the eggshell finish Painting eggshell straight over gloss without preparation can cause poor adhesion, visible defects and peeling over time. Proper preparation is essential for a durable and professional finish.

Hi. It's not a problem. If the eggshell is oil based and the gloss is oil based there should be no issue simply applying another layer of paint. The problem would be if one were oil based and the other water based. In this case oil and water don't mix and more preparation would be needed. Or, if the gloss work is old and fully cured it would then benefit from a light sand to provide a key for the new paint.

1 You need to send it first 2 you need to use the right primer for the surface make sure it 100% dry 3 apply the first coat send it gently to make sure it's smooth no lumps and then apply the second coat for the best finish I prefer the last quote with the soft or spongy roller not with a brush

Don't paint over it. Ideally send as much of the good off. Smooth the area with fine sanding then paint. Probably be a good idea to use a primer first just to hide any bits of gloss missed.