What if someone did find chariot parts in the Red Sea? So what? There is all kinds of stuff scattered all over the Red Sea, the Mediterranean, and the Gulf of Aqaba. Humans have had trade routes and used them for military campaigns throughout the region for so many millenia that it would be more shocking to not find anything.
One of the obvious deficiencies in Ron Wyatt's "career" is that no single archaeologist could possibly have made so many discoveries if they were following the careful protocols that real archaeologists follow. Archaeology is a painstaking, tedious, undertaking under the best of circumstances and often there are dead ends to what look like promising leads.
A 07 is correct that most people who swallow this stuff start with the premise that the Bible is inspired and 100% accurate, so that any archaeological evidence is instantly interpreted as support for some Biblical account of something.
It is also true that sea level fluctuates over long periods of time and it is indisputable that at some point in the past sea level would have been sufficiently lower that the shorelines of all the region's bodies of water would have retreated seaward. Interestingly, 10 or 15 years ago, some archaeologists in Florida found the remains of a campsite with a fire pit and a charcoal pile in a cave now submerged in a 100 feet of water (all of Florida is very close to sea level). I don't know the chronology for sea level fluctuation in the Middle East / Mediterranean area during the period of time when the Jews were in Egypt, but it would be easy enough to find out. Geologists have documented global and regional sea level fluctuations over long periods of time and there are voluminous articles in academic journals about the subject.
Unfortunately, all of the foregoing will fall on deaf ears for the multitudes of fundies who refuse to logically consider the evidence objectively.
Cheers to all (including you believers--and I really mean that),
Alex