Using the door jambs as test spot?

[Crispy]

I tend to try a lot of products and application techniques. I have been testing on my repainted hood mostly as I know the clearcoat is thick and an easy spot to test. Was cleaning the door jambs and thought "hardly anyone uses the rear doors and they are factory original paint" protected from fading and UV damage. Perfect area to test on. Did small test previously on the underside of the trunk lid with my Rupes Nano. Had water spots galore and finished out nice. The door jambs have no water spots so perfect place to try new stuff. Anyone tried or thought of this?

[FUNX650]

Door jambs usually have less (thinner)
paint than the exterior's surfaces.

I'll suggest to approach using these
areas as "Test Spots" with circumspection.



Bob

[RMM]

Door jambs usually have less (thinner)
paint than the exterior's surfaces.

I'll suggest to approach using these
areas as "Test Spots" with circumspection.

Bob

:iagree:

Door jambs are usually a good proxy in order to guesstimate the lowest clearcoat thickness around the car and how far you can go with your polishing.

[TTQ B4U]

^^ what others have said. Especially on non-luxery cars. Higher end ones tend to finish under the hood the trunk and doors much much better than many others. Surprisingly though our Minivan even 10yrs ago has what I consider to be a very good paint coat. I contrast that to my 2010 Fusion Sport that while on the outside was a beautiful candy red pearl the doors and trunk looked like they were satin finish with a half arsed clear job. My car though the jams and trunk are just like the outside. I corrected and polished them up when I first got it and they look amazing still.

[LSNAutoDetailing]

Agree with everyone here, The only time to use door jambs is as a base line for PTG. Knowing that the jambs are assumed to be thinner, if you take a measurement on the hood, and it's less than the door jamb... tread carefully.

[Crispy]

Thanks for all the advice.

As a test spot it would "burn through" on a spot that I could fix easily and be kind of out of sight.

That being said I also learned it is probably the thinnest factory coated surfaces on most cars.

In fact, a couple years ago I did burn through the firewall panel , under the hood, so it is very thin.