Couple questions about stripping paint...

[Topcat]

Sheet metal doesn't get warped from heat as some may tell you. Think about it, how can sand hitting metal make something get hot! Rather, its the metal molucules traveling away from the spot that the media is hitting repeadly over and over like tiny hammers. Ever seen stretched metal? Same thing! Kick your PSI back like I mentioned earlier when using the aggresive medias. You'll be fine.

That is why on sctructured metal like the underside an aggresive media like Aluminum Oxide is your best bet. Strip the outside by hand. Then use a spot hand sand blaster for any areas after that show signs of rust with.

[lemming303]

Mike, that was kinda my intention. To strip most of the paint with stripper and get all the really hard stuff and rust off with media blasting.

How much is the equipment to media blast?

[Topcat]

Mike, that was kinda my intention. To strip most of the paint with stripper and get all the really hard stuff and rust off with media blasting.

How much is the equipment to media blast?

You need a pressure pot sand blaster. Cheapest is at Harbor Freight. Its the same one Eastwood, Autobodytoolmart, and some other places sell. They go on sale and run about 100 bucks for the one that holds 50 lbs of media. Aluminum Oxide here was a buck per lb.

A good compressor of course. These blasters need alot of CFM so hopefully yours is up to snuff.

50 lbs of media. Your choice. Use the chart I provided. I don't recommend sand or baking soda.

Tarps to capture and contain the media. A strainer to sift and re use it. A deadman valve on the gun end.
A heavy duty water separarator. Not the little one. Harbor Freight sells it too. Its blue. Look online I think 35 bucks. A 25 foot air hose to the blaster from the water separator.  Sand blasting head mask, goggles or face shield, jump suit, heavy duty long leather gloves. small hand broom and dust pan, A big funnel to pour filtered media reclaimed back in.

[lemming303]

By deadman valve, you mean like a ball valve to shut off the air when you don't want to spray? Also, how much CFM are we talking? I have not bought my compressor just yet, that will probably be around tax time next year. I was looking at the 60 gallon ones at Tractor supply, I think they flow 12 or so?

[Topcat]

By deadman valve, you mean like a ball valve to shut off the air when you don't want to spray? Also, how much CFM are we talking? I have not bought my compressor just yet, that will probably be around tax time next year. I was looking at the 60 gallon ones at Tractor supply, I think they flow 12 or so?

The deadman valve isn't an absolute necessity to have. In fact, I recall putting the one the pressure pot came with; I put back on because I could turn down air flow at the nozzle to increase PSI, thus getting the media output coming out right.

http://cgi.ebay.com/ebaymotors/Soda-Abrasive-Blast-Media-Sand-Blaster-Deadman-Valve-/230547478063?pt=Motors_Automotive_Tools&hash=item35adb3562f

The compressor needs to be around 12-15 CFM @ 90 lbs PSI ideally. I have a Campbell Hausfeld 60 gallon and it was sweating its balls off to keep up. Had to stop quite often for it to catch up. Was a PITA at times since media would sometimes pour out like water till I got it spraying out like it should. Albeit, a better compressor would eliminate that problem.

An upgraded pump will be an upgraded motor to go with it. If I was to buy a new compressor now, I would buy one that isn't a reed valve type.

http://cgi.ebay.com/Eaton-Industrial-10-HP-43-CFM-Air-Compressor-Pump-/130457590944?pt=LH_DefaultDomain_0&hash=item1e5fe0dca0

There is a slight learning curve to these pressure pots. I'm talking about the valves where they're adjusted to, the tip size being used, and the PSI regulator to the pot. you'll discover you may see yourself going thru ceramic tips fast. So buy an extra set.  I would start at 80 PSI at the regulator. But again it really depends on what media you're using. BTW, buy a really good air filter mask and blast on a day when humidity is lowest.

[Topcat]

http://www.universalminerals.com/WE_CMS/documents/pdfs/sharpjet_blastingguidelines.pdf

[lemming303]

Wow, your car is in a million times better shape than mine is! I dont think I will have the means to do this on my own in the house I'm at now. The garage is kinda small and I think I would just make a huge mess.....

[Topcat]

Wow, your car is in a million times better shape than mine is! I dont think I will have the means to do this on my own in the house I'm at now. The garage is kinda small and I think I would just make a huge mess.....

Then your remaining options are:

Use wire wheel brushes, rust removers, and picklex after before primering.
Send it out to a sand blasting place. That might run a grand or more plus towing costs.

[lemming303]

Yeah, if I do send it out it will be a while. What is picklex?

[Topcat]

Yeah, if I do send it out it will be a while. What is picklex?

Puts a coating on the metal to restrain rust flash from re occurring.

http://autobodystore.com/picklex20.shtml

[shlab2]

just send it in to get blasted, it will cost you more to do it yourself after you buy all the tools you need,and the media isnt cheap.  it is very time consuming and messy. im not saying you cant do it,  but i cut my quarters off and got it blasted and epoxy primered for 1200 bux plus towing but i got it back the nex day and it was sooooooooo sweet to get it back all clean and primered. worth every penny if you ask me just shop around and get someone to do it for a set price

[Topcat]

just send it in to get blasted, it will cost you more to do it yourself after you buy all the tools you need,and the media isnt cheap.  it is very time consuming and messy. im not saying you cant do it,  but I cut my quarters off and got it blasted and epoxy primered for 1200 bux plus towing but i got it back the nex day and it was sooooooooo sweet to get it back all clean and primered. worth every penny if you ask me just shop around and get someone to do it for a set price

I don't see how this exceeds 1200 dollars.

Whatever works best. Pay the cash and sit in your recliner till its done or get out and DIY and save.

You need a pressure pot sand blaster. Cheapest is at Harbor Freight. Its the same one Eastwood, Autobodytoolmart, and some other places sell. They go on sale and run about 100 bucks for the one that holds 50 lbs of media. Aluminum Oxide here was a buck per lb.

A good compressor of course. These blasters need alot of CFM so hopefully yours is up to snuff.

50 lbs of media. Your choice. Use the chart I provided. I don't recommend sand or baking soda.

Tarps to capture and contain the media. A strainer to sift and re use it. A deadman valve on the gun end.
A heavy duty water separarator. Not the little one. Harbor Freight sells it too. Its blue. Look online I think 35 bucks. A 25 foot air hose to the blaster from the water separator.  Sand blasting head mask, goggles or face shield, jump suit, heavy duty long leather gloves. small hand broom and dust pan, A big funnel to pour filtered media reclaimed back in.

[lemming303]

Wow, that stuff sounds like it's a wonder chemical! Does it really work in all the ways that it says?

[67vertman]

Wow, that stuff sounds like it's a wonder chemical! Does it really work in all the ways that it says?

Mike turned me on to it....and yes it works!  I had a lot of surface rust in the trunk, wire wheeled it, sanded it and then Picklex'ed it.....no more rust, not even flash rust.

[shlab2]

just wondering what the op ended up doing and how it looked underneath the old paint.


oh and nice comment topcat but i dont even own a recliner, your the one with 8000 posts!!!!
and how much would you say a 15 CFM@90 PSI / 60 GAL compressor will cost him
oh and enough epoxy primer to paint an entire car plus a gun to spray it
plus all the stuff you said
then you got to build or buy a rotiserie so you can get underneath the thing

it just dont make sence, send it in and get it back the next day so you can get to important stuff like installing patch panels and bodywork instead of sweeping up sand and dicking around for months

its just my opinion for other readers