Blending Paint.

[Macroni]

I bought a 1986 Guards Red 911.

The door has been re-painted and is a bit brighter than the rest of the car.

Is there a way to better blend w/o painting again?

[962porsche]

yes you can blend both single stage colors and base clears .
the 1st step is to always buff up the adjacent panels no matter how clean and shinny they are its a must to do .
you then should tint the color . many people think reds are hard to get right . not true at all reds only have a few tints in them so it knowing how reds change over the years ( fading) to match them right .
when tinting a red you do not add in more of one tint then another you subtract a tint or two to match the color properly . a sprayer has a hard time matching colors and painter can match colors . your average shop only hires sprayers as they don't have to pay them half as much money per hour .
if your only taking about the gloss ?
and the color is spot on there could be a few reasons for the gloss to be different .
1st is if the car is a single stage color and the shop used base clear the gloss will not have the same look and it never really will or could .
if this is the case your just screwed !
if the cars finish is all base clear and it's just more glossy then the rest of the car . the gloss will dull out over time but for the next year or two you will have to deal with it .
the shop should know how to also match the cars gloss . at times you have to over reduce the clear to knock out some gloss to match the cars gloss . a real painter will know this and the amount of over reduction that would be needed to get a proper gloss match .

one other is the cars texture of the finish . many shops will color sand and buff every thing they paint . one reason is they are such bad sprayers they have to or the car owner would flip if they did because the paint work is that bad .
this will make a freshly painted panel smother and at time more glossy then the adjacent panels . one reason is there is no texture to reflect light and give you the same gloss as the rest of the car . i'm taking about a micro texture not a full blown orange peal .

just looking at a finish the average person can't tell if it's a base clear or single . you could take a piece of ultra fine color sanding paper and on the lower part of a panel sand a real small spot . if you have the body color on the sand paper it's S/S if it's white then it's B/C . you then could just take a little compound on a rag and buff the little spot back up .

[Macroni]

Thanks.... will study.