is removing old undercoating prior to a new one required?

[spyghost]

kelangan ba talaga tanggalin to bago maglagay ng bago? e diba mas maganda kung masmakapal ang undercoating?

[raine]

nililinis lang ng pressurized water pag tuyo na apply na ng bago.

[washburn]

pwedeng tangalin din ng pressurized water at konting kutkot mas ok to kaysa patong kasi para ma inspect mo kung may rust, at dapat din tuyong tuyo talaga para iwas rust, so kung may rust siya pahiram mo lang ng turco rust converter ganto ginawa namin ni erpat sa pickup namin

[cliffy1523]

sir how much would it cost for a re-undercoating. and who does?

thanks!

[XTO]

Spyghost, As much as possible maalis ang mga loose or cracked old undercoat, kaya na ng pressure washer yan plus brush, at dapat tuyong tuyo, wag mamadaliin. then inspect kung may rusts, kung meron pwede i-turco or dun i-concentrate ang application ng undercoat.

^^^Summertime is the best para magpa undercoat…. Any gas station of your choice will do. Iba iba lang ang gamit nila…IMO Shell stations use the Rustguard dahil mahigpit sila. Sa mga petron and caltex pwede ka magdala ng preferred brand mo like 3M rubberized.

kung AUV mga 3.5K+ dahil 2 gallons ang gagamitin....kung cars, 1 gallon mga 2K+ siguro di abot ng 3K.

[Syuryuken]

Skung AUV mga 3.5K+ dahil 2 gallons ang gagamitin....kung cars, 1 gallon mga 2K+ siguro di abot ng 3K.

next month magpapaundercoat ako sa casa ng Isuzu 3M ang gagamitin 2.5k lang

yan ang casa ko hindi taga kung maningil

[soujiro]

kelangan..pressurized water lang nman tpos pagtuyo na lalagyan na ng bago..mas mganda na ung hugasan bago lagyan uli pra tanggal ung mga nanigas na putik..

[mqavila]

On a related note, is it recommended to have rustproofing done on a brand new car? Or is the factory-done rustproofing sufficient?

[mcbry]

how often ba kailangan magpa undercoat?

[number001]

To answer the thread title, usually the rustproofing place (Tuff Kote Dinol, Ziebart, etc..) don't bother to remove the old coating. Its a very time consuming process and not to mention the manpower, tools, chemicals, etc involved to undertake such a task. Lugi sila pagka ganoon. They even claim that letting it accumulate layer by layer results in even better protection and sound insulation.

On a related note, is it recommended to have rustproofing done on a brand new car? Or is the factory-done rustproofing sufficient?

I have read publications from the US (both online and printed) that undercoating or rustproofing is unnecessary for modern new vehicles. Nevertheless, I just have it applied once the vehicle comes out of the casa and just leave it at that. No more unnecessary reapplication unless there is significant flaking, wear, etc...

how often ba kailangan magpa undercoat?

If you were to follow the "recommended" schedule of those in this rustproofing business, every quarter "free" underwash and inspection. Every half year, underwash and retouch. Annually, they would respray everything again.