If you make photocopies of topo maps on your printer you can preserve them a bit better by spraying on some Thompson’s Ultra Water Seal. Also besides waterproofing this treatment seems to give paper more resilience when repeatedly folded.
It’s important to spray the Water Seal on the map B/C brushing on may blur the map by making the colors run.
Yeah, I realize there are specific map waterproofing fluids available but they are ‘spensive and you only get a little bottle of it. Hey, use that extra Thompson’s Water Seal on the deck or doghouse.
