If this were Fiberglass or Wood I would suggest a mild solution of Bleach and Water. The problem here is that I am not sure what you are trying to clean. Here is what I know, Mold/Mildew needs Moisture or Humidity to survive.
I would start with ventilation and trying to dry the area or areas. Maybe using a Dry Heat and Plenty of Air Circulating as a start. On Boats the is a De-Humidifier that is basically a small Heater and a Fan to Circulate Dry Air.
Here are is a link that you may find helpful;
Mold and Mildew
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have Coach will Travel
Steve & Tricia
1982 Newell 38' (built before #1) 6V92 DD, 5 Speed Allison, 12.5 KW Kohler, Couch used to make into a Bed but I fixed it!
https://newellshowcase.com/thumbnails.php?album=214
2007 Yukon, 1981 CJ7 Laredo, 2002 Honda CRV, 1955 Thunderbird, 1952 Pontiac Sedan Delivery, 1952 Ford 8N, 1958 Airstream, 1959 Glasspar 16' Avalon, Cabin in the Woods........what will I work on next
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