Yes

Suggest trying a test area first.

It is possible but this was not designed for this purpose.

This is a silicone based coating.

This paint should not be welded over. If you need to apply a coating before welding the only option we have would be our Self Etch weld through primer found here: https://www.eastwood.com/ew-self-etching-weld-thru-primer-16-1-oz-aero.html

The surface should be sanded and cleaned with our PRE painting prep prior to applying.

Kelly H / using the engine, even idling, is "forced curing"... There are a few negatives to using the engine to cure the paint; the fumes are toxic, they are created because it's getting too hot. This makes coating not adhere well which makes it not last. If the paint isn't cured, when installing the manifold to the engine, the mounting hardware, fingers with grease, wrenches or sockets will scratch or remove the coating. So I marked your response as unhelpful. I always put a heat gun in one end of the manifold and turn it on. While it's warming up I start brushing the coating on. After a few applications I keep the heat going until it it's cured to the touch. While painting, it's a good idea to take the heat gun out a few times, because you don't want the metal too hot. If you get the manifold too hot the coating wont stick well. Next day I install the part. Applying the paint this way all but alleviates the toxic fumes, but it's always best to be outside or have the shop door open and a fan going while performing this. I would say a dedicated paint or powder oven would be just the ticket for consistent application. I have done this numerous times and have never had an issue. When cars come back in for service or at a show, I check my work. This coating is pretty good especially compared to ceramic coating $$. I own a shop where we restore old British sports cars, 30 years and counting.

Hi,, no, this would be externally coated, and the 0.2 sensor is on the inside of the pipe or exhaust manifold