The older parts of Glastonbury — Buckingham, Addison, Hopewell, the streets around the Center — have mature hardwoods, and mature hardwoods drop things in autumn.
Most of it is harmless. Two things are not, and the second one surprises people every year.
Impact, which is real
An acorn falling from forty feet arrives with real energy. On a bonnet or a roof it can leave a small, shallow dent — often with no paint damage at all, which is what makes it puzzling to look at.
Black walnuts are considerably heavier, and a walnut in its husk from height reliably dents a panel.
This is not a detailing repair and no amount of polishing addresses it. Small dents without paint damage are usually a good candidate for paperless dent removal, which is its own trade and comparatively cheap. We mention it because people bring these to us, and pointing you at the right trade is more useful than taking the booking.
The staining, which is worse
Black walnut husks contain a compound that is a genuinely powerful natural dye. It has been used as one historically, and it will stain skin, concrete and clothing.
On a car, a crushed husk sitting on paint leaves a deep yellow-brown mark that behaves like a dye rather than like dirt. It penetrates rather than resting on top, it resists ordinary washing completely, and on porous surfaces it is essentially permanent.
Where it does the real damage is not the paint at all — it is the surrounding materials:
- Textured plastic trim, wing mirror housings, roof rails and lower cladding, which are porous and hold the dye in the texture
- Rubber seals around doors and the windscreen
- Concrete driveways, where a run-over husk leaves a mark that outlasts several summers
On sealed clear coat you have a chance if you get to it early. On textured trim, often not.
What to do
Get husks off the car the same day. This is the whole strategy, and it matters more than any product. A dry, intact husk brushed off leaves nothing. A crushed, wet one left overnight is a stain.
Do not run over them on the driveway if you can avoid it, because that is how they get crushed onto the tyres and then flicked up into the arches and lower panels.
Rinse rather than wipe, since husks and shells are hard and abrasive.
For what has already landed, a proper wash and decontamination lifts what is on the surface and clay removes what has bonded. That is our exterior detail at $145 and our full detail at $275.
The honest limit
We will tell you plainly: staining that has soaked into textured plastic trim frequently does not come out completely. We can improve it. We are not going to promise to remove it, and anyone who does has not dealt with walnut before.
Paint is a better story — sealed clear coat is far less porous, and early-season marks usually come off.