Auto DIY Tips Collision Repair Training - Block Sanding Body Filler - Bondo (Auto Body Sanding)

[corvetteracer916]

Hey! I had a question. I am looking into purchasing this project car and on the ad he said he took it bare metal and sprayed it with black primer. If this was spray paint, am I in trouble with rust and further paint issues? Can this be fixed to be painted by a pro?! Thanks!

[ahawnt]

I'm doing a small (1" x 7") repair that I filled. I don't want to scratch the surrounding paint because it's so thin already because of color sanding and repeated compounding and I only want to prep about 2" around the repair (5" x 11"). I was thinking of using primer to save the surrounding paint. Good idea or not? Any other suggestions?

[ButlerCollision]

@ahawnt I am not sure if I understand you, but are you asking if you should prime your filled area, yes you should. You can try to keep your primer area small by back masking to prevent a hard edge of primer build up. Does this help?

[ahawnt]

@ButlerCollision Thanks, I ended up working the repair area much larger than I started with 2 weeks ago (it just keeps getting bigger). I've finally primed and blocked off the guide coat I shot but there's a wave on the wheel arch. I know I need to go back and apply more filler -- any tips on working a curved area so I don't cause flat spots. Thanks for the tip on back masking btw! I'm going to sand the surrounding clear with 1500 and back mask edges before shooting basecoat

[ButlerCollision]

@ahawnt If you are working on a curved area, try using a round block. If you do not have one you do not have one, you can make one out of a piece of radiator hose or wood. This will help the block fit the contour better. I hope this help. Thanks for watching.

[SwPiotrek]

Thanks for your videos.

[ButlerCollision]

@SwPiotrek You're welcome, thanks for watching!

[jatontherun]

Excellent videos! Very helpful information! I appreciate you taking the time to post these. I notice you mentioned a DA. What is that?

[ButlerCollision]

@jatontherun DA stands for dual action. This is an air sander. For more info. visit CollisionBlast(dot)com/3MDA

[sohcbeast909]

great videos i went to sbvc i work at a shop. but i always watch ur videos good info keep up the good work sir

[ButlerCollision]

@sohcbeast909 Thanks for watching!

[ltlocus]

0:16 texting in class is a no no. do you want to learn or not?!

[jexplosion]

@ltlocus how about the guy at 6:40 with the earbud in 

[multimediaman256]

I'm just getting into body repair, and some of the terminology is a bit over my haed - what's a guide coat? is it just a tiny spray of the primer or body paint you're planning on using?

[ButlerCollision]

@multimediaman256 guide coat is just a primer that can be sprayed over filler of primer to help you find lows.  As you canned the color will stay on the low areas. Then you know to repair the area.

[jun19020987]

Very Helpful indeed. Im almost done with my body work but i still watch this for more ideas. Thanks for sharing!

[krausean]

I have seen people apply etching primer before applying body filler. Is this better for rust protection?

[ButlerCollision]

@krausean No, I would not recommend applying etch primer before body filler. The only thing that I have heard that was recommended was to apply it over bare metal or over epoxy primer. Check with the paint manufacture to determine if the brand allows the use of etch primer. I have never heard of it.

[demencialchico]

@krausean no only over some epoxy primers its recommended but you dont really have too

[trader891]

These videos are extremely well done.

[bassplayer1274]

so the darker the guide coat the higher the spot is???

[nhalexhale420513]

@bassplayer1274 na, when its more darker its a low spot, when its a high spot and u sand that shit it will be just metal

[cellplato]

why is he wearing glove????????????

[2011Bigfoot]

Nice video i am taking autobody right now while in highschool and we use different techniques so there are different methods of doing things. Like i said nice vid but don't use gloves while trying to feel for roughness or lowspots use ur bare hands but the palm only

[furiajose]

the dude with the phone din't get it just wasting time , i wish i have that chance to learn . good video

[RotaryZero]

@furiajose yeah, i saw that! he even has earphones on..wtf?

[cellplato]

80 is way to coarse to start out with on a dent that small :(....he should of used dry 180 then prim....red puddy if needed.. then finish it off with wet 400..

[rgulley72]

@cellplato the color of the putty varies from the hardener youre using... the putty you may be refering to is an after primer putty that fills in cracks and imperfections in the primer. which should be used very lightly as it does not have great adhesion so let cure ALOT.

[chris19911991]

bad video how are feeking for high/low spots with gloves on. feel with the palm of your hands son

[mitchellgonzalez]

I noticed the same mistake, also he uses sand paper 80 too abrasive to start with, it always leaves scratch marks when job is finished, he teaches how to make a quick BOTCH JOB!!!

[SkylarkGSX]

We use a non spray powder guide coat in our shop. It's effective. I like that stuff because it does get really hard to "see" the smallest of imperfections. We say to "let our hands be our eyes". Nice video though. Spot repair is our bread and butter huh? LoL.

[KombiPode]

Good tute but @5:30 I get lost about when you would apply some more body filler? How are the shades etc indicating that? And the 2. @4:50 I get confused about you say "Just want to put this light dust cost on" - you mean PUT it on or leave some dust on?

[ButlerCollision]

It is better to use several thinner coats, rather than one thick coat. Therefore, many times it is necessary to add another layer after the first coat is applied and sanded. The guide coat is dusted on or (lightly sprayed) to help indicate low areas. If there is a low area, more filler will need to be added.

[jamii192]

how can you feel that good with gloves on? =S

[pigidly]

can you reaaly feel good with gloves on?

[ButlerCollision]

Everyone is different. Some like bare hand and many recommend using a rag. They claim the rag helps indicate lows and highs. If I was actually about to send it to the painter, I'd probably feel of it closer. This was just for demonstration. Many times, I use metal glaze to finish the job.

[Dasquadwith6]

funny you should mention the rag...same concept, just the other day I was sanding primer on the bed rails of a 1999 Chevy S10...there was a low spot I couldn't seem to feel with my bare hand, but when I went over it with a dry paper towel, I was able to feel the spot.

[demencialchico]

@ButlerCollision so you after bondo work you would go ahead and use metal glaze to fill in scratches and block with 150 to 220?

[cowmoomoo99]

Wonder if the dude with the IPOD got any of that .

[280zx2by2]

what brand filler is that?

[ButlerCollision]

I believe that we were using Rage. However, we use several different brands. We also use a filler made by PPG. The newest filler we started using is made by 3M. It is their new system that come in cartridges and uses the new gun to apply it. There are a lot of good fillers out there.