Good posts....BUT....these are only temporary repairs and for a vehicle to continue to be roadworthy (and third party compulsory insurance and your comprehensive insurance, etc. to continue to be completely valid) the tyre should be either (a) replaced; or (b) repaired by service personnel trained for that job.

That is not to say that you will get a better job done - there is the possibility that the job might be worse - the certainty is that you are entitled to expect that the work is "fit for the purpose" i.e. for your safety, the safety of your family and the safety of all other drivers. Absent that 'entitlement', if the excrement hits the fan for any reason (not necessarily your fault), you would have few rights to pursue e.g. to rebut a claim against you for negligence.

If the repair gets you out of the bush, terrific. Good and all as "plugs", etc. may be the manufacturers limit their liability by spelling out the "temporariness" of the repair. The tyre ought be professionally repaired or junked.

Same goes for wheels with rims that have been hammered back into shape.