Hey guys, new to this forum and new to painting. I'm getting ready to paint my motorcycle and have been spraying a lot of practice pieces to get ready for the real thing. First off I've been having trouble laying down my primer, I'm using HOK 2 part epoxy primer (KP2CFA/B I think) and it isn't laying down quite right. The base and clear spray fine but the finished product has a slight textured look due to the slightly spotty primer spray. I've tried playing with gun settings (DeVilbiss 1.8mm tip gun), and cutting the primer with some reducer to thin it out; the gun is at correct psi etc.. What do you suggest to get a smoother primer coat? Also how long do you guys normally wait after clearing to buff, and is it normal to wet sand the base coat, or is that a no-no. Thanks guy, sorry a lot of questions I know.
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Newbie with questions
- Thread starter Dude_man
- Start date
Hey guys, new to this forum and new to painting. I'm getting ready to paint my motorcycle and have been spraying a lot of practice pieces to get ready for the real thing. First off I've been having trouble laying down my primer, I'm using HOK 2 part epoxy primer (KP2CFA/B I think) and it isn't laying down quite right. The base and clear spray fine but the finished product has a slight textured look due to the slightly spotty primer spray. I've tried playing with gun settings (DeVilbiss 1.8mm tip gun), and cutting the primer with some reducer to thin it out; the gun is at correct psi etc.. What do you suggest to get a smoother primer coat? Also how long do you guys normally wait after clearing to buff, and is it normal to wet sand the base coat, or is that a no-no. Thanks guy, sorry a lot of questions I know.
first off, welcome. are you trying to use a "primer" as a "sealer", meaning are you applying your basecoat ontop of the "wet" primer? primers are ment to be cured and sanded before any topcoats are applied, sealers are applied for a uniform color to spray your basecoat over. if y our spraying the primer and then letting it flash and then spraying basecoat on toip of that, then your going about it wrong. if you want a completetly flat paint job, first prime your part and wetsand with like 400 after its cured, then seal the part and wetsand with like 600 again, after its dry. put your basecoat on, then clear. let the clear fully dry, wetsand with aroung 1000, then reclear. thats just the way i do it, everybody does it a little different. as far as sanding the basecoat, yes you can sand it, but i always apply another coat after sanding to fill in the sand scratches, especially on metallics. as for how long to wait, it all depends on the products you are using. air dry? force dry? what type of clearcoat? hope this helps
T
TAZ
Guest
Sounds like onelowxa has you covered.
Most of the time we just wetsand the next day. You may want to wait one extra day just to make sure it's nice and hard.
As far as sanding the basecoat, same as onelowxa said, you can 'nib' the surface, just recoat, ESPECIALLY if it's a metallic. You may even have to spray a couple coats over this.
If I have to nib the bc, I usually use 1500.
Welcome to the forum!
:cheers:
Most of the time we just wetsand the next day. You may want to wait one extra day just to make sure it's nice and hard.
As far as sanding the basecoat, same as onelowxa said, you can 'nib' the surface, just recoat, ESPECIALLY if it's a metallic. You may even have to spray a couple coats over this.
If I have to nib the bc, I usually use 1500.
Welcome to the forum!
:cheers:
Thanks for you help guys. Let me just recap this to make sure I have everything straightened out
1. Epoxy primer, let cure
2. wet sand epoxy primer with about 400 grit
3. spray with sealer
4. Do I let sealer cure, sand, then base coat, or do I flash dry sealer and spray bc right over it?
5. lay down base coat, sand with 1000-1500, let cure, recoat, let cure
6. Lay down clear coat, let cure, sand with 1500, let cure, recoat, let cure
7. sand with 1500-2000, Buff parts.
Let me know your input :moon:
1. Epoxy primer, let cure
2. wet sand epoxy primer with about 400 grit
3. spray with sealer
4. Do I let sealer cure, sand, then base coat, or do I flash dry sealer and spray bc right over it?
5. lay down base coat, sand with 1000-1500, let cure, recoat, let cure
6. Lay down clear coat, let cure, sand with 1500, let cure, recoat, let cure
7. sand with 1500-2000, Buff parts.
Let me know your input :moon:
T
TAZ
Guest
Here is what we do 90% of the time. Looks like it would be quite a bit less work to!!
1. Epoxy primer, let cure
(usually overnight or the day after is fine)
:bigokay:
2. wet sand epoxy primer with about 400 grit
(or dry sand with 320 if you are doing a solid color)
3. spray with sealer
(try to spray a sealer that is most compatible with the color you are going with)
4. Do I let sealer cure, sand, then base coat, or do I flash dry sealer and spray bc right over it?
(no, wet on wet, meaning, spray the sealer, mix your basecoat, and spray right over the sealer. If using HOK, us a KSxx sealer)
5. lay down base coat, sand with 1000-1500, let cure, recoat, let cure
(just nib it if needed. 90% of the time, I do not, just spray base, then spray basecoat. I would tack off the bc though)
6. Lay down clear coat, let cure, sand with 1500, let cure, recoat, let cure
(only reclear if needed, if you don't have any thick graphics, you shouldn't have to)
7. sand with 1500-2000, Buff parts.
:bigokay:
8---have a cold one and celebrate!
:drunk:
1. Epoxy primer, let cure
(usually overnight or the day after is fine)
:bigokay:
2. wet sand epoxy primer with about 400 grit
(or dry sand with 320 if you are doing a solid color)
3. spray with sealer
(try to spray a sealer that is most compatible with the color you are going with)
4. Do I let sealer cure, sand, then base coat, or do I flash dry sealer and spray bc right over it?
(no, wet on wet, meaning, spray the sealer, mix your basecoat, and spray right over the sealer. If using HOK, us a KSxx sealer)
5. lay down base coat, sand with 1000-1500, let cure, recoat, let cure
(just nib it if needed. 90% of the time, I do not, just spray base, then spray basecoat. I would tack off the bc though)
6. Lay down clear coat, let cure, sand with 1500, let cure, recoat, let cure
(only reclear if needed, if you don't have any thick graphics, you shouldn't have to)
7. sand with 1500-2000, Buff parts.
:bigokay:
8---have a cold one and celebrate!
:drunk:
OK OK, one more question! I've also seen/heard of people laying down a "guide coat" and was wondering if anyone else does or has heard things about it. Basically its lightly spraying a primed part with regular black paint (not a sealer) then waiting until it drys and sanding that black down so you can be 100% sure that the surface transitions and such are completely smooth. Anyone do this?
OK OK, one more question! I've also seen/heard of people laying down a "guide coat" and was wondering if anyone else does or has heard things about it. Basically its lightly spraying a primed part with regular black paint (not a sealer) then waiting until it drys and sanding that black down so you can be 100% sure that the surface transitions and such are completely smooth. Anyone do this?
yes, this is a common practice. you can use flat black spray paint, or they make a black talc powder that does the same thing. a word of advice though, just because you guide coat someting and sand all the guide coat off that does not guarantee you 100% that your work is straight. its all about using the right block for the job, and your blocking techniques
First off, the guide coat was awesome, it made a huge difference. But now I'm in a situation. I'm working on painting my sportbike, the whole bike will have a black basecoat and there will be silver decals everywhere. I've been waiting for my decals to arrive, it's been almost 3 weeks since I ordered them, and I really need to get going on this paint job. I was planning on putting the decals on top of the base coat then clearing over that, but since I need to start laying basecoat, would it be alright to spray base then clear that, then let that cure until the decals come then clear again over all that? I don't see a problem but who knows. I'm using all HOK paints, and my last question is how long do you HOK users let the clear cure until you sand and buff the parts, and how long after buffing should I wait to mount the parts?
Peace.
Peace.