The hardware may be brass, so you should use care with what tooling you use on it to remove it. The decorative cover behind the handles are sometimes in the trade called "backplates". The trim around the keyhole is known as an "escutcheon". They can be made with an included in the plate casting, mounting pins/nails. Or, they could be screwed onto the face from the inside.
The piece may not have been stripped, but maybe just sanded. Before using a stripper, you might try wiping down with lacquer thinner. Or, if stripping is needed, start with the least toxic of strippers. As a starter use a waterbased stripper like CitriStrip gel. It can be used indoors and not as toxic as an MC (methylene chloride) stripper. If after one or two applications of the gel, a stronger stripper is needed, "Aircraft Stripper" in the blue can is one of the strongest strippers I've used that is sold over the counter.
I would follow directions on the can for application and clean up. I would not use a water power washer under any circumstance. It can damage/loosen joints, and raise the grain. It could blow out what was invisible fixes in the woodwork. It makes a mess, and the caustic materials blown about can affect asphalt and discolor concrete, not to mention it will kill grass and plants. It's not eco friendly.
It may just need sanding. If that's it, sand in the direction of the grain.
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