You can't powder coat small areas and blend the surface in. You could rub down all blemishes, mask off the stickers with a buffer zone around them. Paint the fork then buff the paint around the join of old and new paint taking care not to buff the stickers away, but it's a lot of faff. If the fork is black you might get away with it but good luck matching any colours. If you're paying someone to do this it will be more expensive than a full repaint with new stickers.