i was in the business for most of my life owning 2 IH totors . if u need detail parts send me a message or PM me on my group.. i just got some jacks and jack stands in to add to the bed detail on the one i built.. here is the link the one i built ..
spray in vented area (enamel only ) let soak 8 hrs unless new paint then just 4 hrs...scrub with old tooth brush under warm water. dry and re pete if needed..
best way to fix it is trash the putty. i tried it years ago but never liked it.. get you some of this you will be glad you did.. Bondo Glazing & Spot Putty... you can get it from just about anywhere..i get mine at Walmart.. dries fast sands easy..