37 replies to this topic

[evl666]

Hi guys, I've been asked by my body work guy to strip my flat panels ie. bonnet, boot lid, doors, roof etc before it goes to the sand blasters to do the sills, floor etc. Now I've gotten to this point with 3 loads of KBS paint stripper (4 layers hidden under there)but was wondering if there is a secret to finish cleaning the panel off. I've seen those 'clean and strip' wheels, can I use these? Not too much heat when using them? The paint stripper is struggling to clean what's left on the panel. What grit sand paper can I use on the panel to clean it to bare metal with out damaging the panel itself? Any help would be grateful!

Attached Files

•  image.jpg   133.89K   17 downloads

[torana_nick]

When it's at that stage I used 80grit on a DA sander. Came off realy easy.

[EunUCh]

Paint stripper is shit and messy,Bomber will know but probably the best way is use a stripping pad on  a big variable speed grinder,it still gets hot if you stay in one spot too long,so move around ,for the creased edges,hit it with media,80grit sounds nice.

Edited by EunUCh, 14 September 2014 - 07:01 PM.

[evl666]

So 80grit is fine on the bare metal??? Just don't want too go to heavy on the panel to cause problems later on. 80 grit wet or dry ?

[madtoranajzedded]

doing a great job so far evl666.as above 80 grit will give the etch or epoxy plenty of hold,i taped up all my seams where i didnt want

the stripper to go.but seems you are sandblasting you should be able to get at it

 

 

cheers Maz

[evl666]

Yeah it's getting the full treatment. Thanks guys for the info !

[UCSLE]

I use acrylic thinners to get the last of the paint off after paint stripper .

[evl666]

The kbs worked really well up to the point in the pic but that remaining primer coat is being difficult . I'll try the steel wool. I'm happy to use the paint stripper but just wanted info on how to finish the remaining paint/primer off to give me a nice totally clean panel

[S pack]

I don't like using coarse sanding discs/paper when stripping paint, they take the factory zinc anneal coating off. Unless you apply an etch primer straight away, the panels will begin to surface rust very quickly, especially in humid atmosphere. When I have the panels at the stage shown in your pics, I apply a medium coat of paint stripper over the panel & wearing latex gloves, I use coarse steel wool & hot water to remove the last of the original paint. I clean up with dry rags & compressed air. Water neutralises the paint stripper as well, which is important otherwise the residue can cause problems with the painting later on. Another point to remember is that Prepsol & paint thinners don't neutralise the stripper. If the panels are going to sit in bare steel for a short time before body repairs/etch priming, I apply a light coat of WD40 to prevent any surface rust. Although it is a silicon based product, it cleans off very easily with Prepsol when you are ready to begin repairs. Just my opinion based on experience in the trade & restoring my own cars.

What zinc anneal coating on the body panels??? Maybe on cars built since the early '80s but not our beloved Torana's. They were made from plain old black steel sheet metal.

[EunUCh]

strip the remainder off with a stripper disc, hit the bare metal with straight septone rust converter,it will go a shity grey/black color but it will rub off ready for etch primer and clean up ,keep finger grease/acid and moisture away...there was another thread about this around here about how long panels will last in this stuff.

it seems to work...just 2 bobs worth ....they usually had a lead base primer...oohhhh the good ol days.

Edited by EunUCh, 14 September 2014 - 09:05 PM.

[Ice]

I was only trying to offer help/advice based on my experience in the automotive restoration business. I guess several award winning restorations don't qualify my opinion enough. Fair enough, I'll keep my opinions to myself.

If you got any common sense listen to this guy he knows his shit

[S pack]

I was only trying to offer help/advice based on my experience in the automotive restoration business. I guess several award winning restorations don't qualify my opinion enough. Fair enough, I'll keep my opinions to myself.

Not meaning to knock your work or expertise mate. Just stating a fact about the sheet metal used in the manufacture of our old Holdens.

[Ice]

Your knowledge and work is second to none Matt ive seen your cars first hand absolutely straight as a die
wish i could drag you over here to work on my cars lol

[evl666]

So with the steel wool like a course grade 3 type?

[SS hatch]

3m paint & rust stripper disks. I use 7inch variety on a slow speed pulls paint off quickly without damage to metal.Slow and let the disk work without clogging the pores is the secret.From memory 20 bucks for one which used correctly lasts very well.

[evl666]

Red scouring pad????

[grumpy xu1]

I use either use a clean & strip wheel or 180 dry "or free cut" if you like, & yeah i neutralize the panel first. The old acrylic paint can be very hard to get the last of. As for trying to etch as good as the old red lead, i use the sikkens epoxy etch 2 pack, basically chemicaly treats the steel to prevent further rust so far i haven't found anything else that works as well as this product. & when used correctly i would very highly recommend it. Mind you it's around $100 per litre @ trade. It's best to etch the panel ASAP. If covered ie like with a flanelet sheet in a dry she'd i have kept the epoxy etch primer on for years with no problems or rust. Gary.

[madtoranajzedded]

i always thought using 80 wet will give the epoxy more hold power.but i dont use a power tool to do it .all by hand,and all

ways in a left right direction.never had the sander and broke as all buggery lol.i know alot of peeps who use 400 wetndry

  then epoxy,then 400 again.would the 400 be equivalent to the scouring pad ?.i like to start rough and gradually use

finer paper as i go through the coats to give each coat a hold over the other.i thought that made sense.

  does anyone know what holden did when preparing panel.they look like they were never sanded after stripping

 did they rely on the  red oxide to bite into the metal ?

Edited by madtoranajzedded, 15 September 2014 - 02:11 PM.