How to strip a gloss paint from door
Hi Lisandra. Use a soy based stripping product. These are sold in the big box stores. If you can't take the door off, use plastic on the floor to catch the stripping product's drips. Using a paint scrapper is the best way to take off the excess product as it dissolves the stripper.
Use a deglosser - available at hardware stores.
A deglosser will only remove the shine, not the paint.