Amount Of Dripless Undercoating To Use.

[George7941]

I sprayed my Sierra last weekend. I used the undercoating from Monarch Oil
https://www.monarchoil.com/

This is the first time I used the dripless oil, I have always used the drippy version. It took 4 litres to spray the entire truck! I had to stop three times to refill the cup on my gun. That was annoying. I used the RP-460-HD gun from Lemmer
http://www.lemmer.com/contents/en-us/d36_rust-proofing.html

There was not much undercoating on the ground after parking the truck overnight, so that is an indication I did not apply too much. I applied enough to ensure all the metal under my truck was covered.

Ambient temperature was around 20C. Maybe with warmer temperatures I might have needed less.

Does 4 litres sound excessive?

 

[Kestas]

I once sprayed 5 gals of rustproofing on a car.

 

[StevieC]

No amount is excessive when it comes to rust-proofing.

Sounds about right.

The drip stuff is best for the doors, rockers etc. to creep and seep. The non-drip is great for the under carriage. I prefer a non-solvent based drip oil everywhere so be sure it's getting into the areas I can't see.

 

[KrisZ]

Monarch oil creeps just fine. If the truck was never sprayed before, then a gallon sounds about right, but on the subsequent resprays you will use less.
I even started to thin out monarch stuff with WD-40 as the layers were starting to build up too much and I felt I didn't need that much grease underneath.

Here is the creeping action after about a week after I sprayed the car. I originally only sprayed the inside of the wheel well, the oil crept around the fender to the outside.

IMAG0254_zps0bcdcdae by Yahoo Cane, on Flickr

 

[StevieC]

I never used that stuff and was going based on what he said about it non-dripping so I assumed it was more grease like. Good to know it creeps.

 

[George7941]

The truck has been sprayed before, three times by a Krown shop and a few times by me with drippy oil. When I sprayed I only did the brake lines, fuel lines, top of the fuel tank and some other vulnerable areas, not the entire truck. I did the entire underbody this time with the dripless.

 

[KrisZ]

Originally Posted by George7941
The truck has been sprayed before, three times by a Krown shop and a few times by me with drippy oil. When I sprayed I only did the brake lines, fuel lines, top of the fuel tank and some other vulnerable areas, not the entire truck. I did the entire underbody this time with the dripless.



A truck is much bigger and has lots more going on under than my little Mazda 3.
The first time I sprayed it, after years of Krowning, I used about half the gallon. Afterwards I was using about a third of the gallon.

One gallon is perfectly normal IMO.

 

[George7941]

Good to know it is normal. What I am going to do is get a 10 litre pressure pot to hold the oil so that I am not constantly stopping the spraying to refill the gun cup. I have to spray some large trucks

 

[doitmyself]

Originally Posted by Kestas
I once sprayed 5 gals of rustproofing on a car.

George7941, did you spray inside the frame rails and other cavities?

 

[Nick1994]

Originally Posted by Kestas
I once sprayed 5 gals of rustproofing on a car.

Did you spray the surface of the body panels and underneath the carpet too?

 

[George7941]

Originally Posted by doitmyself
George7941, did you spray inside the frame rails and other cavities?

Yes, I did. My main frame rails are C sections, not boxed. Some of the cross members are boxed. They have holes on the bottom side (drainage?) and I sprayed thoroughly through the holes. There are sheet metal shields underneath the box, above the exhaust pipes and muffler and I went to some trouble to ensure that the bottom of the bed above the shields were sprayed adequately.

I would have loved to see the floor/ground underneath Kestas' car after he sprayed five gallons on to the car.

 

[Kestas]

Originally Posted by doitmyself
Originally Posted by Kestas
I once sprayed 5 gals of rustproofing on a car.

When you do it yourself, you do it right. It's a lot of work for me to rustproof a car. I got all the spots that mattered, including the cavities. I wanted to make sure I didn't have to do it for a while. The stuff does dry and wear away with time and requires recoating. The car took it all. I used Texaco Rustproof Compound. I buy it by the 1/4-barrel.

 

[maxdustington]

Originally Posted by Nick1994
Originally Posted by Kestas
I once sprayed 5 gals of rustproofing on a car.

Did you spray the surface of the body panels and underneath the carpet too?

Don't forget inside the exhaust!

 

[Nick1994]

Originally Posted by maxdustington
Originally Posted by Nick1994
Originally Posted by Kestas
I once sprayed 5 gals of rustproofing on a car.

Did you spray the surface of the body panels and underneath the carpet too?

Don't forget inside the exhaust!

Yeah like this, but with undercoating oil

 

[StevieC]

That's the new emission standard. It washes exhaust emissions. It's like Blue-Tec but they use a different system.

 

[George7941]

Bought a 10 litre pressure pot.
https://www.princessauto.com/en/detail/10-litre-paint-tank/A-p8006581e
The pot is built like a tank. Made of very heavy gauge steel. My existing gun hooked right up to it with no adapters needed, The pot came with the hoses, 3/8 in fluid hose and 1/4 in atomisation air hose.

I sprayed one vehicle with it over the weekend and it was a pleasure not to have to stop and refill. The previous 1 litre cup that the gun came with would run out in less than five minutes of continuous spraying.

 

[demarpaint]

In the case of drip-less rustproofing compounds, the more the better imo. I apply it until it looks like molten ice cream.

 

[irv]

Originally Posted by George7941
Bought a 10 litre pressure pot.
https://www.princessauto.com/en/detail/10-litre-paint-tank/A-p8006581e
The pot is built like a tank. Made of very heavy gauge steel. My existing gun hooked right up to it with no adapters needed, The pot came with the hoses, 3/8 in fluid hose and 1/4 in atomisation air hose.

I sprayed one vehicle with it over the weekend and it was a pleasure not to have to stop and refill. The previous 1 litre cup that the gun came with would run out in less than five minutes of continuous spraying.


That's a nice looking set up! It brings back memories when my bud's and I use to do our own. I still wish I had the area/room/means to continue with that but such is life.
Let us know how it works for you.

 

[KrisZ]

That indeed looks like a nice setup.