Hey guyz, is it okay to use bondo on acrylic? i want to know.. because, on the case im working on, im putting 2 sheets of acrylic on top of each other. and err.. im not good at explaining, so probably u guyz can understand it more if i show u pic xD




thanks guyz

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anybody? please !!

So.. basically you want to fill that "gap" with bondo & then sand, prime & color it?

TDR

ya if i can.. if i cannot, then what should i do...

(Mostly just to fill the gap)


thanks

yeah you should be able to i think. just make sure you prep the surfaces correctly

ight i got an okay from 1person.. i wanna see the others' response first


thanks me_john

Quote: yeah you should be able to i think. just make sure you prep the surfaces correctly

Aha..ok.. Yup... I think if you lightly sand it & don't forget to use rubbing alcohol to degrease it properly, it
should work...

TDR

Quote: Originally Posted by KiwiFlavor ight i got an okay from 1person.. i wanna see the others' response first thanks me_john

hey just letting u know u dont want to u an automotive bondo.... u have to use a bondo that is for use with pastic i made that mistake with my AT that im moding and it just cracked when i was putting the front panel on soo u have to use the plastic bondo which has some flex and give to it but i cant remember the name of what the stuff is called.......

Lee

I would say yes since it is a plastic body filler.Just be sure you have a rough surface to bond to.Jo

Quote: Originally Posted by lpapirny hey just letting u know u dont want to u an automotive bondo.... u have to use a bondo that is for use with pastic i made that mistake with my AT that im moding and it just cracked when i was putting the front panel on soo u have to use the plastic bondo which has some flex and give to it but i cant remember the name of what the stuff is called....... Lee

It is called KITTY HAIR

Quote: Originally Posted by lpapirny hey just letting u know u dont want to u an automotive bondo.... u have to use a bondo that is for use with pastic i made that mistake with my AT that im moding and it just cracked when i was putting the front panel on soo u have to use the plastic bondo which has some flex and give to it but i cant remember the name of what the stuff is called....... Lee

*nods* in agreement!

Quote: Originally Posted by NeCrOmAnCeRoFsIn *nods* in agreement!

Bondo can be used to fill in areas of acrylic. Cracks, holes you don't want etc.
But the adhesive properties are not as good with acrylics as other plastics. Especially is you don't rough up the acrylic by sanding and clean properly.

But Bondo losses some of it's structural capabilities with the plexi and acrylic families of materials.
You'll especially notice a problem is the acrylic piece is going to be flexed from time to time. Like a window on a door.

If I have to do repairs on a plexi or acrylic I use a two part expoxy resin and if I have to thicken it up to a paste consistency, , I use milled fiberglass dust.

! thanks guyz ! so either epoxy resin and kitty hair? ok i'll try to find those two

btw do u think home depot has them? i tried to search for epoxy and i all i found was epoxy putty ! what is that? can it be used to fill a gap between acrylic and plastic?


thanks guyz

lol @ m'livvy

oo btw can i use epoxy putty tho?

oh i forgot to ask.. with what grit should i sand the acrylic for the primer to bite on??


thanks

your best bet for fiber glass materials would be a marine supply store, they carry the Dust that prime was talking about and they should also carry thin shreds (chop) that i like to use for structural integrity (both usually come in a thick tube).

For this project i would stick more to the fiberglass products, resin-mat-powder-chop-dura glass.

for primer....the final grit shouldnt be any less than 320 grit unless your using filler primer (thicker) which you can go down to 220 or depending on your mixture or if you using a ratttle can, down to 180 (not reccomended unless its REALY thick stuff that doesnt shrink much). if some of the primer is going on the bare acrylic then i just scuff it up with some scotch bright, and use some plastics adhesion promoter before you spray and that "should" take care of chipping problems with minor flexing.

now, with glass products its very rare to get the product realy smooth like with a putty, so pic yourself up a tube of marine glaze. its like a watered down bondo and is very flexable, this stuff is only used for filling in pin holes and deeper scratches. Would be a great to put a very thin coat over the glassed area and sand down smooth with 180grit-220 then 320.

Remember, when finish sanding (sanding right before any paint) , use a light touch. So instead going over an area 3 times with a normal touch, go over it 7-8 times with a light touch

hope that helps.

-edit-
oops, remember to realy scuff the parts where the glassing material is meeting the acrylic....like with 80 grit. and always use wax and grease remover before paint.

Actually there is easier way to work with (In your case, filling in gaps) acrylic.
All it requires is an old modder's standby-- hazardous chemicals and waste materials.
In this case, ZENNZZO gives the solution in this guide.

Quote: Originally Posted by Seikatsu Actually there is easier way to work with (In your case, filling in gaps) acrylic. All it requires is an old modder's standby-- hazardous chemicals and waste materials. In this case, ZENNZZO gives the solution in this guide.

I've read the guide and it's an invaluable tool for understanding this scope of work. I do have to say however, that working with Methyl Ethyl Ketone is not something to be taken lightly.

Although it can still be purchased (surprisingly) in paint stores and home centers, in almost every state this chemical has been outlawed or at least heavily regulated in manufacturing use because it is so hazardous to your health.

Consult the MSDS before using this stuff.
It is known that MEK can cause severe damage to your liver and will penetrate the skin, directly entering the blood stream, if you do not wear protective gear. Inhaling the fumes are equally bad.
Use Acetone as a substitute whenever possible and don't use MEK any more than you really have to!

Ouch. Thanks prime-evil for the warning.

I'll stick with the nail polish remover.