a question about appropriate puncture repair

hello,

unfortunately I had puncture in one of my front wheels.
I went to the wheel service and the employee has fixed the puncture (located on the crown) by sticking a simple patch stick within the tire's internal surface.
as it is explained in the following video:
https://www.youtube.com/watch?v=mdTAalpkSLM (https://www.youtube.com/watch?v=mdTAalpkSLM)
the hole must be filled with a rubber stem preventing water and moisture entering the body of the tire. (something that reminds a mushroom). (as far as I know it is the only way of repair that allowed by law in my country).
as far as I was disappointed from the inproper puncture fix, I went to another service, and in order to do so the employee has removed the patch stick and and prepared the surface the using the buffing wheel, then sticked it to seal the breach from inside.
I wonder if it was ok to do so since it has to be made by the "mushroom" at first place and whether it doesn't make additional damage or any danger by the second and the additional repair. Thank you.

It is unclear what was wrong with the first repair. The video you referenced is from the Tire Industry Association - a US based tire organization for tire dealers primarily known for its training programs. This video appears to be for that training purpose and I think you can consider it authoritative.

However, the video not only shows the right way to do a tire repair - as well as several examples of improper repairs - and it is not clear which you are pointing to.

However, I am sure you can figure out from the video what is a proper repair and what is not.

As for law I couldn't tell you what is right. The "mushroom" is a plug patch I use it sometimes when it's a larger nail or something if it's a very small hole I just use a good old patch. I have heard water can get in the hole and cause problems but have never seen it happen.
As for your second repair when he pulled the patch off he had to buff it to get a good clean spot making that rubber on the inside a little thin.

It is unclear what was wrong with the first repair. The video you referenced is from the Tire Industry Association - a US based tire organization for tire dealers primarily known for its training programs. This video appears to be for that training purpose and I think you can consider it authoritative.

However, the video not only shows the right way to do a tire repair - as well as several examples of improper repairs - and it is not clear which you are pointing to.

However, I am sure you can figure out from the video what is a proper repair and what is not.

Thanks for your reply. The first repair lacked the rubber stem filled within the injury channel to protect the steel cables from corrosion. The repair concluded in putting a single stick patch on the hole at the internal tire's surface. The correct method of repair was finally established at I've already said, however what concerns me at the moment is whether its normal repairing the same puncture twice using different methods (removing the old stick, and using the buffing wheel on same surface to make it smooth again). I mean, does it harm the tire, and performance and more important - safety. I mean, wasn't it better leaving the prior repair the way it is, nor replacing the tire to a new one. I did what I especially because only "mushroom" repair is legal in my country + as it is explained in the video, it is better and safer. Thanks.

As for law I couldn't tell you what is right. The "mushroom" is a plug patch I use it sometimes when it's a larger nail or something if it's a very small hole I just use a good old patch. I have heard water can get in the hole and cause problems but have never seen it happen.
As for your second repair when he pulled the patch off he had to buff it to get a good clean spot making that rubber on the inside a little thin.

The main question is - whether repetitive buffing at the same surface doesn't harm it make it weaker. I am not specialist but I'd rather following the law and making the best repair rather than wondering and worrying. in my country anyways mushroom repair is the only one that allowed and I'm saying it after look-up.

If it is law then you need to talk to the first shop that fixed it. Yes if the inside rubber gets thin air could get between layers causing bubbles. But some tires have pretty thick rubber. Where do you live that your so worried about your tire patch?

While buffing twice in the same spot is not a good idea, if done judiciously, it could be OK.

Why don't you monitor it for a while and see if it either leaks or creates a bulge. It it doesn't - after say, a month - then I think it will be OK in the long term.