sandblasting

I Googled "south texas vehicle undercoating" and found a number of undercoating services, some specialize in trucks and RV's.

Having done some sandblasting I can say I would not do it. There is way to many areas that sand can get in to where it doesn't belong. How bad can the underbelly be?

I would recommend a degreasing solvent be sprayed on and then pressure wash before undercoating.

Brian in Michigan wrote:
Having done some sandblasting I can say I would not do it. There is way to many areas that sand can get in to where it doesn't belong. How bad can the underbelly be?

My thoughts exactly.

Ask about soda blasting. It like sandblasting, but uses sodium bicarbonate (baking soda) - usually in water - rather than sand, and is commonly used on industrial equipment that might become contaminated if sandblasted. In our area they often use it on fiberglass boats to remove old bottom paint, and the higher end body shops have the equipment for use on trucks and autos. It is still important that you have someone do it that knows what they are doing, and it will not be cheap.

Do they still oil the bottoms of vehicles in Canada? That used to get done every year by a couple of my Canadian relatives and might do what you are trying to do.

bsinmich: I would like to know more about "oil the bottoms of vehicles". Seems like it would be quite a mess, and probably expensive.

It was cheaper than undercoating but had to be done every year. It worked best if you left the car outside because it did drip for a while.

I forgot about CO2 blasting. I have a friend that has helped a buddy of his do CO2 blasting on commercial buildings it'll knock the heck out of what is being blasted but leaves nothing but the debris that is being hit.

Yes, oiling the underside of vehicles is still a common proceedure. I have my have my Dodge Ram 1500 done once a year. Costs about $100. per application. Although, I'm sure that it would be considerably more for a motor home.

Krown vehicle undercoating

It is a bit messy afterward as it drips for as much as a few days. Not a problem on grass or a black top driveway, but can stain a concrete driveway. Keep in mind that the coating ("oil") is clear. Not dark as typically thought of when thinking "oil". Seems to work well. I guess I'll find out in a few years.

The Krown Company is Canadian based, but they have many locations in the states that do the applications.