I thought I had posted this. But I guess not. 2 levels of updates.
I finally finished off the garage and then kept the humidity out a little bit better. I then bought a dehumidifier. One of the R2D2 looking ones, not a small one mind you. I set it in the car and would run it 12 hours a day when I was home. I did that for about a month and between the drying out and the heat it seemed to work. I got this idea from someone who I spoke with on the phone who worked for one of the local mold/mildew treatment places. Basically said, dry and warm was what you need. The dehumidifier provides both. He said the clorox cleaner with bleach and other "spray" type items are in the right direction, but that they contain so much moisture that they are actually adding to the problem rather than helping.
Part 2. Several years later I moved and did not have a garage at the new place. It sat outside and was fine. It then got moved to my parents barn which is basically a quonset hut style cement floor barn. Due to field mice and stuff like that we put tarps over my car and another car that were to be stored and sealed all the sides with 2x4s so the critters could not get in. 6 months later uncovered and BOTH cars had the same mold. Looks like our mistake was not realizing humidity would come through the concrete floor. I have not gotten around to dealing with the 2 new issues yet. The solution I am going to try is to put tarps down on the floor and basically "wrap" the car.
I finally finished off the garage and then kept the humidity out a little bit better. I then bought a dehumidifier. One of the R2D2 looking ones, not a small one mind you. I set it in the car and would run it 12 hours a day when I was home. I did that for about a month and between the drying out and the heat it seemed to work. I got this idea from someone who I spoke with on the phone who worked for one of the local mold/mildew treatment places. Basically said, dry and warm was what you need. The dehumidifier provides both. He said the clorox cleaner with bleach and other "spray" type items are in the right direction, but that they contain so much moisture that they are actually adding to the problem rather than helping.
Part 2. Several years later I moved and did not have a garage at the new place. It sat outside and was fine. It then got moved to my parents barn which is basically a quonset hut style cement floor barn. Due to field mice and stuff like that we put tarps over my car and another car that were to be stored and sealed all the sides with 2x4s so the critters could not get in. 6 months later uncovered and BOTH cars had the same mold. Looks like our mistake was not realizing humidity would come through the concrete floor. I have not gotten around to dealing with the 2 new issues yet. The solution I am going to try is to put tarps down on the floor and basically "wrap" the car.