I was thinking that just about everything other than leather will burn on the pipes. I have leather pants that work, but require rain pants for the rain. Otherwise I wear sailing gear, waste high, and bib pants. Ski pants are warm, but not water proof. Oiled cotton would be good. I have a jacket. Have not seen those kind of pants for a while. Belstaff and Barbour were the original manufacturers. Not cheap these days. The tack shops and some outdoorsy places have jackets. My jacket cost $100 in NZ. A Barbour jacket is about $700 I have been told. Sailing bib pants are about $100. Some name brands are more. I think my leather pants were about $100. They are better than chaps IMO. Just thunked. A leather patch could be sewn on to the area that touches the pipes.
UK