so i bought a cheap polyurethane lip off of ebay (just for now) and i've decided im just going to rattle can it. I did some research on google and such but i want to make sure this is the correct way to do this.

1. dry sand the lip with a low grit like 300
2. prime
3. wet sand with a high grit like 1000
4. base coat
5. clear coat

is this correct?

 

nope.

clean with hot water and tsp,
scuff with red scotch brite and scuff stuff with hot water,
rinse clean and let dry,
wipe with a quality plastic cleaner,
spray with bulldog or other plastic adhesion promoter per directions on can,
spray with a quality 2k primer,
sand, but do not break though to plastic,
sealer,
base,
clear

 

^^ after primer do i wet or dry sand? or does it matter.

 

dry

 

What grit

 

wet sand with 400 or 600 will be fine.

 

What color are you painting it? I usually scuff mine up with a red scotch brite pad and wipe down with alcohol. Let it dry and prime/paint it. Wet sand with 800-1000. Then hit up with some clear coat. No need for adhesion promoter like bulldog. The wet sanding process can also be skipped if you want. It depends on how much of a hurry you're in.

 

Silver. And I don't understand am I suppose to dry or wet sand? Also what is this red scotch brite you speak of?

 

When it comes to primer, I dry sand first with 180 to take out any small bumps and what not, then wet sand with 600

 

if the lip is brand new, with no scratches or body work that needs to be done, then make sure the 2k primer you use is a sealer.... seal it, base it, clear it

do all the steps mentioned above, except use a sealer not a heavy build primer... then go straight into base and clear. no sanding of any primers... only sand/scuff of the bare plastic

 

Make sure to scuff with a Gray or Red Scotch-Brite pad before applying sealer. If you seal over anything less than 600 grit, sand scratches will show.

 

well obviously all these guys are professionals and do this everyday for a living.

plastics must be properly prep'd or paint will not adhere correctly. every rock and bug that hits it will pop off the paint. you cannot just sand and paint plastic unless you like half assing it.

 

^^ understood. i shall follow your steps jspecsir and thank you.

 

post picture of the final result