Sand blasting

[Germy]

Used play sand to remove undercoating from fenders. Took 4 hours. Went to hit the paint and it barely removes it. Is there a more coarse sharp substrate? Walnuts too soft right?

 

[mtnwhlr]

You might try some Airplane Stripper it's a paint stripper that works real good. You just brush it on and watch the paint bubble up. If it is thick and real hard after you brush it on cover it with plastic that will keep it from drying and will let it work longer. Then you just take a putty knife and scrap it off. With sandblasting you need to watch that the metal doesn't get to hot. You can warp the metal with a sandblaster.

 

[CJ]

Also please wear a mask if sand blasting - silica dust can be hazardous. See -->> Sandblasting, Sandblasters Silicosis Risks

 

[Les]

If you do use stripper, which works very well btw, be sure to remember that it will not just eat paint, but it will eat you, if you don't take precautions, plus it will absolutely destroy any and all plastic or rubber if it stays on for any length of time (snubbers, tires, etc). Also, be sure to flush the area you strip really really well with water afterwards, especially in all the crevices, or the stripper can stay in there and greatly promote corrosion later.

 

[Germy]

I have airplane, thought the firewall would be easiest blasting. Stripping with drip onto my freshly primed frame. May have done things in wrong order should I just Scotchbrite and degrease and prime and paint?

 

[mtnwhlr]

If it just your firewall that may be your best bet. Why did you think it needed stripped?

 

[Germy]

Rusted bottom and general lack of body knowledge.

 

[Germy]

Just got excited

 

[Les]

Anything you have painted or otherwise don't want to get any stripper on, can be masked off. You can use heavy aluminum baking foil along with a roll of aluminum foil tape. You can get the tape at most hardware stores, and it is stripper resistant. The materials are different, but the masking process is the same as normal. The tape and foil method is what I used, back when I worked at an aircraft paint shop many years ago.

 

[mtnwhlr]

Rusted bottom and general lack of body knowledge.

So just sand blast the rust and treat it with something like POR15 and the rest you can scotchbrite.

 

[Germy]

I have to flatbread to the blaster at my friends house. I just took the fenders over. I'm going to degrease and wire wheel the out of it. I'm just going for a clean compartment , not restoration. When the time comes, that route will be taken

 

[PaRenegade]

I had no luck with blasting the undercoating, it took forever. So I used a propane torch and a putty knife, then cleaned up the remnants with wd-40. I uncovered 30 year old factory paint that I could put a shine on.
But any paint blasted off fairly easy using Quikrete medium sand. I only did the underside, as I didn't want to risk warping the metal where it would be visible. The fenders, grille and hood I'll probably use stripper after a rough up with some 60 grit to cut the clear surface and let the stripper soak into the paint.

 

[Germy]

Yeah, I used quickcrete play sand, really fine. The undercoating was a bitch. I too found treasures while doing the frame. It was so coated in oil and , the original finish was in great shape. I tried a wheel last night that you put on your drill, effortlessly removes everything. I'll be in the garage drinking beer and stripping if any one is imterested

 

[Germy]

View attachment 11494

Got one side of each fender finished. Got to bare metal then rust primed damage and self etch primed the rest. I ran the dehumidifier in the garage to 55. Light scotchbright and three coats of satin rustoleum. I did not do any repair, so yes I see the bad spots, just proud to do it myself and look nice.

 

[Germy]

Firewall is scotch brighter and degreased. I degreased 10 times and I guaranty paint will find a few places not to stick to. I cleaned with simple green and scotch bright a bunch of times. Then I did soap a few times. Will she be ready for primer or will I need to scuff more?

 

[mtnwhlr]

Go ahead and prime it. Then when you scuff the primer if you find any spots that didn't stick you can address them and reprime. But it sounds like you should be ok.

 

[Germy]

Cool, cool, thanks! Ran into a few of those spots on the frame

 

[Germy]

Here it is primed. Going to see if I can get a coat of black on tonight. I have a comm dehumidifier and a fan in there. Hopefully the primer sticks well.ok,

 

[Germy]

View attachment 11541
View attachment 11542

 

[0822]

Looking good!!!!